I believe the difference is because there is alot written throughout the Bible concerning prayer.
If the verses you cite were the totality of what God has written concerning prayer, we might all believe as you. But the Bible, of course, has much more to say concerning prayer. To believe as you do, you must ignore other portions of scripture.
Perhaps it would prove helpful if you could write out a prayer that you might pray. This way, we can compare your prayer with the scripture and see how it compares.
There is a lot I would like to add here, but I don't have the time. Late start, so I will just tell you what happened to me, and what I said and did to fix the problem.
One time, years ago, I had a kidney stone attack, if I can call it that. It was terribly painful.
I endured that for about half an hour or so, when all of a sudden, an anger came over me, and while still in great pain, I spoke to the source of said pain saying, "In the name of Jesus, I command you foul stench [my name for unclean spirits], come out of me and be gone into the pit of hell, in Jesus' name." And I also said, "I speak to the source of the pain, I command you to be gone from my body, in the name of Jesus."
I repeated the commands like that for only about 2 minutes, and all of a sudden, it felt like something that was squeezing my right kidney, was gradually releasing its pressure. And in about another 2 minutes, it was completely gone.
I have another event I would like to tell you.
Again, years ago, I worked outside for just a few minutes in some cold drizzling misty type rain, and before the end of the day, I felt some cold symptoms coming on, only it felt worse than a cold. I later figured it might have been the flu. Still don't know, but that is what I thought it was.
Well, at the end of the third day, I decided I was going to get rid of that thing. I didn't seek God on it or ask Him if it was His will, I just decided I wasn't going to have it any longer.
By that time, I had a really bad headache, sore throat, all my muscles ached, and even my skin hurt. I was very tired, felt terrible, and had mucus coming out in my urine. I think that might have been a bladder infection. Don't know, as I am not a doctor.
So I started out with a prayer to God.
I said, "Father, forgive me for anything I have thought, said, or done that was offensive to you, that was sin. Wash and cleanse me, I pray, in the blood of Jesus, in Jesus' name." And I said more concerning my repentance. Then I said, "Thank you Father for forgiving me and cleansing me, according to your word."
I then went after the spirit and source of the sickness. I went at this for about an hour and a half strait, with all that was within me. That means, I was yelling and coughing while praying.
Keep in mind, the whole time, I felt miserable, was in pain, and just wanted to lay down and sleep.
And because God had given me a revelation and some experiences concerning a verse and faith, I used it for my faith.
The scriptures I used were,
Mat_13:12 For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath.
Mat_25:29 For unto every one that hath shall be given, and he shall have abundance: but from him that hath not shall be taken away even that which he hath.
Mar_4:25 For he that hath, to him shall be given: and he that hath not, from him shall be taken even that which he hath.
Luk_8:18 Take heed therefore how ye hear: for whosoever hath, to him shall be given; and whosoever hath not, from him shall be taken even that which he seemeth to have.
They all basically say the same thing, only I didn't use the part that says, " he that hath...", but the part that says, "he that hath
not... Another way of saying, 'I don't have' something is, 'I reject having' said thing, because that's what faith is. This is one of Jesus' explanations of what faith is.
Peter put it this way,
Act_3:6 Then Peter said, Silver and gold have I none; but
such as I have give I thee: In the name of Jesus Christ of Nazareth rise up and walk.
And by the way, in the above verse, Peter just used the word of faith on that man, to get him healed. It is a good example of what I did, only on a much smaller scale.
So because I didn't want the flu like symptoms, I said repeatedly things along these lines, again, with all that was within me.
"In the name of Jesus, I speak to the source of the symptoms, I speak to you foul spirit, I bind you and command you to take your filth off me. I command you to loose your hold and be gone form me, in Jesus' name."
Then I said repeatedly, "I reject you symptoms. I reject you cold. I reject you flu." I said this, because I didn't know what it was.
I continued, "I do not have a cold, I do not have the flu, for I do not receive it, and I utterly reject you."
Again, I am speaking directly to the thing, NOT to God.
After that I would say, 'Thank you Father for removing that foul stench from me, as I do not receive it, and according to your word, I thank you for removing and taking away this foul thing. For you said, that whatsoever I don't have, shall be forcefully taken from me, even that which I think I have. Thank you Jesus for delivering me. I praise you Lord, and so on.
And last, I ask my heavenly Father to heal my body, because of the damage that thing had caused.
This I did, over and over again. The repenting, I only did once at the start.
And after about an hour and a half, it felt like a lifting or easing of something removed off of me. Every symptom gradually left within a half hour, except for the mucus in my urine. That took a whole day. I think it was because it was already there and that was the only way for it to come out. But I was healed the day before, when the other symptoms left.
Why did I get delivered and healed? Because I believed the word of God over what I was feeling and did according to that which was written. I stood on the word of God, I fought the good fight of faith, I spoke to the so-called mountain, didn't doubt in my heart, but believed that what I said should come to pass, I therefore had what I said, as God watch over His word and hastened to perform it, and in that instant, I got the victory.
I have more, but I will leave it at that for now. Let me know what you think.