Is what you are saying is that all of what Paul writes...should be rejected.
Nope. I am saying that Paul is not God, and Paul must not be treated as though he is God. God makes law. Paul does not make law. Paul was a bishop, just like the Pope is. We don't reject what the Pope says out of hand, or Paul. We respect it, we think about it - but in the end, we don't let it govern us contrary to God.
Paul wrote about women and hairstyles in 50 AD. We do not pretend that Paul's opinions about these things somewhere in Greece in 50 AD is the Word of God, or the will of God, or the law of God, for us today. It is not.
We think about it, and about how that shows that spiritual leaders of a time, walking in Christ, have to make local and temporal judgments on time, place and manner issues.
We do not start taking those time, place and manner opinions of men and turning them into God's Law forever. That is a gross error, that ends up driving people apart and away from God when it is done.
Indeed, that is precisely what the Pope and clergy are accused of having done that brought about the Reformation: taken a bunch of their rules and insisted they were God's rules. Well, they weren't. The Pope is not God. The clergy are not God. And Paul is not God.
I recognize that for some, the Bible is a God-maker: it's in the Bible, so therefore it's all God's law. That is an error also.
God always identifies himself in Scripture. And when he makes law, he is clear about it. The Nazirite vow did not permit the cutting of hair at all. Was it a disgrace for a man to keep his vow? Samson's hair was uncut and that was the visible sign of his power (God was the source of it). Was Samson shameful, Paul?
No. Paul is not God. Paul's opinions about women teaching and hair length of men are not the law of God, the will of God, anything of God. They are Paul's opinions and they are properly disregarded completely, because God himself gave examples of his own direct action that are diametrically opposed to what Paul said in those matters.
Paul was a spirit-filled man. That did not convert every idle word he ever wrote in a letter into being God's Law. To do so anyway is to lapse into idolatry - ignoring the direct words and deeds of God on a matter in favor of a letter by a man whose opinions are elevated to the same status of the words of God, by men, on the basis of a single line written by that same man.
It's a mistake. I've heard the sermons from the 60's that long hair on the peaceniks was a sign of Satan. How stupid! It was not. Jesus had long hair.