See this is THE crux of our disagreement, and having struggled through this very issue I also to did not understand how we could "choose" Jesus and then be robbed of free will and not be able to "unchoose" Him if I felt like it. I didn't see how a loving God takes us in "free" but makes us His slaves. I'm with you, when I thought of things like you are here I believed the same thing you're saying. I get you and think that it makes perfect sense. The thing is you are wrong like I was.
The way He opened my eyes to this I am sure you can just dismiss because it has to do with how He saved me specifically, and I don't use that to "prove my point" because I understand that others shouldn't just believe what I say anyway, but I thought this EXACT same way when God reminded me that when I did it the way you're describing, I heard the gospel and responded to the Alter call, I repeated the prayer with all my heart, with all my free will I chose Jesus and was declared saved. Guess what? I wasn't saved. Then a motorcycle wreak turned my world upside down I tried my best to work through it, but thinking I was "saved" already I found it completely lacking and unhelpful and after 2 yeas left me hopeless. When I hit my knees I did not believe in God anymore if I ever had at all, but I hit my knees seeing very clearly where "my way" had lead me and I quit it. I had no idea what was actually happening at the time because I had already been told I was a Christian so was not seeking in that direction anymore. For this 2 year period I had uncontrollable suicidal thoughts at least every five minutes of every day for 2 years solid. The next day after I woke up and went to work it was lunchtime when it hit me "I HAVEN'T THOUGHT ABOUT KILLING MYSELF ALL DAY!!!!!" Right then and there on that spot I knew two things, #1 Whatever this was it was from God.#2 Jesus is His Son.
He led me strait to His word and John, by the time I hit chapter 3 I KNEW I had been born-again, or spiritually resurrected and reconciled to His Spirit. THIS is the part I find missing from what you write. See I too at first thought I chose Him, but th truth is when I did that I was a false convert deceived into thinking I followed Jesus, yet did NOTHING to further the Kingdom. However when He saved me in truth, in POWER I woke up the next day knew. No more suicidal thoughts, no more video games, no more porn, and not because I decided to quit these things but because He empowered me to put them down and I'm now in His Spirit in truth to be led to all truth by Him. You falsely believe we have a will that puts salvation on our shoulders, you rob that glory from God and in turn falsely believe we have this "freewill" to walk away from Him too. It's just not true and foreign to scripture for those with eyes to see. We are slaves either way. Slaves to sin or slaves to obedience leading to righteousness.
I know you guys hate Calvin and this seems to blind you from understanding certain truths that have nothing to do with him or the system named after him, these are just things the bible clearly teaches and that makes some peoples minds shut down in hate and start the recording that never ends or leads anywhere good.
I am sure you'll disagree, but you mistake here is a terribly low view of the power of God that I believe can only come from those who've never experienced or known it. Have you truly been born-again? Spiritually resurrected?