I think it’s because Paul’s writing style is so averse to all the other writers he was a Jewish Roman citizen by birth and was given all the best educations of the time where as the others were poor Jewish fishermen under Roman tier y and suppressed when it came to Roman educations of course the Hebrew people are educated but what I mean is the writing is a different style
Paul’s words are eloquent and beautiful he uses many examples and quotes much Old Testament prophecy as he is revealing its content . He sometimes stretches one single point out for two or three chapters really making it thoroughly clear using several examples
His writings for perfectly and require us to hear what Jesus said first in the gospel to really understand Paul’s terminology
For instance jesus began teaching this sort of abstract form of teaching where he is separating mans spirit and man’s flesh
“That which is born of the flesh is flesh;
and that which is born of the Spirit is spirit.”
John 3:6 KJV
“It is the spirit that quickeneth;
the flesh profiteth nothing:
the words that I speak unto you, they are spirit, and they are life.”
John 6:63 KJV
So later Paul came along teaching those people who heard things like that in the gospel referring back to Jesus and his doctrine with the language Jesus established
“This I say then, Walk in the Spirit,
and ye shall not fulfil the lust of the flesh.
For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.
But if ye be led of the Spirit, ye are not under the law.
Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.
But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, meekness, temperance: against such there is no law.
And they that are Christ's have crucified the flesh with the affections and lusts.
If we live in the Spirit, let us also walk in the Spirit. Let us not be desirous of vain glory, provoking one another, envying one another.”
Galatians 5:16-26 KJV
sorry to confuse you lol I just am saying I think a lot of people don’t read and understand Paul they take single sentences out of his writings instead of reason what he’s teaching in his epistles in chapters listening to his words like he’s a teacher
paul is absolutely of God and agrees with Jesus on every point in his words he’s a servant of Jesus and the gospel witnessing it’s truth and power to the world