the only reason people think that, is because modern false teachers omit His doctrine and preach thier own and then label it pauls doctrine. pauls doctrine is on the money its just hard to understand when you dont hear Jesus first.
I would offer by adding my understanding to it . Its the results of taking the exclusive "things of God" not seen and accrediting them as the "things of men" (Blasphemy) as that seen.
We walk by faith, the eternal unseen, not by sight the temporal as if the eternal kingdom did come by observation. The reason the outward Jew did not receive Christ.they required observation.... glorying in the flesh.
They never become Paul's doctrine as if what Paul did not receive it freely and he would have something to boast about as if he did not receive it freely.The apostles do not rise above that which is written .
God gave him the words and watched to make sure they were fulfilled. In that way Our living God is a watcher, teacher, comforter and guide who also is accredited for bringing to mind daily that which he has taught us..As a watcher He must increase as we decrease.
paul taught this type of stuff in every epistle and no one ever really speaks of it, because it destroys the modern versions labeled his doctrine
The meaning of the word apostle has been almost destroyed .The modern version in defining the word apostle in most cases gives the word a meaning foreign from the Bible.
Ultimately in the end of the matter violating the warning in Deuteronomy 4:2 in respect to changing the meaning of a word (single) which is different than the warning in Revelation 22 .Do not add to the book of prophecy, the Bible
Note.....
(purple in parenthesis) my added comments
Deu 4:2 Ye shall not add unto the word (singular)which I command you, neither shall ye diminish ought from it(singular), that ye may keep the commandments(plural) of the LORD your God which I command you.
For instance .Some say a requirement is they have seen the Lord. As if for one thing the scriptures would instruct us to walk by sight, as if the Kingdom of God was of this corrupted world and it came by observation. Therefore making us the watchers in respect to what our eyes sees as in natural man and not the eyes of our new hearts as men of the Spirit of Christ (the watcher).
A good root definition of the word apostle with no other meaning added or subtracted from the root of the word I think would help solve many of the conflicts of those who are looking at another gospel unaware.
The apostle Jeremiah under the inspiration of another the Holy Spirit, helps us understand what it means that Christ performs that which he appoints to us. As we are informed in Philippians 2 of His imputed righteousness .in so much that our Emmanuel who works in us to both will and perform His good pleasure . Not Paul's good pleasure or the good pleasure of Moses, or Jeremiah or after any man
Then the word of the LORD came unto me, saying, Before I formed thee in the belly I knew thee; and before thou camest forth out of the womb I sanctified thee, and I ordained thee a prophet unto the nations.Then said I, Ah, Lord GOD! behold, I cannot speak: for I am a child. But the LORD said unto me, Say not, I am a child: for thou shalt go to all that I shall send thee, and whatsoever I command thee thou shalt speak.Be not afraid of their faces: for I am with thee to deliver thee, saith the LORD.Then the LORD put forth his hand, and touched my mouth. And the LORD said unto me, Behold, I have put my words in thy mouth.See, I have this day set thee over the nations and over the kingdoms, to root out, and to pull down, and to destroy, and to throw down, to build, and to plant.Moreover the word of the LORD came unto me, saying, Jeremiah, what seest thou? And I said, "I see a rod of an almond tree".(the sign of the rod of rebellion) Then said the LORD unto me, Thou hast well seen: for I will hasten my word to perform it.Jer 1:12
In the passage above the;
"I shall send thee" is the qualification of a apostle'
If we add meaning to it or subtract from it it changes it into false.
Interestingly as the Spirit of Christ witnessed to the spirit of Jeremiah he uses the sign of rebellion "I see a rod of an almond tree" to verify the words he put on the apostle Jeremiah's tongue.The same applies to Paul or any God sends (apostle) with his word. prophecy.