Paul says it outright. He is NOT speaking for YHVH, he speaks for himself when he says he wishes all men were celibate. It's not a commandment. (And it's not for me, BTW.)
It's his opinion, he says so.
A while back, in a thread having to do with studying His Instruction ['torah'] -- which I'm for, BTW -- I noted Paul's self-described opinion on celibacy, and made what I thought was the obvious quip that it HAD to be his personal opinion, because, as a commandment, it would conflict with essentially the first commandment in the Book. ('Be fruitful and multiply'. Kinda hard solo.)
But "is it Scripture!!!!" was the non-sequitur refrain. So, given that some in what I must refer to as "xtianity" [where 'scripture' seems to mean whatever fills the 501c(3) coffers this week] treat even hideous mis-translations of Paul as superior even to the Words in Red...
I offer this:
(it came to me while preparing for this afternoon's "Come out of her, My people" Show)
From his first letter to the Corinthians, chapter 14:34-35
"Let your women keep silence in the churches: for it is not permitted unto them to speak; but they are commanded to be under obedience, as also saith the law.
Let your women keep silence in the churches: for it is not permitted unto them to speak; but they are commanded to be under obedience, as also saith the [Written Torah] law.
Now, I realize these verses won't even surprise most here. But what I suggest is a bit of "compare and contrast."
Why do the same [licensed, usually!] 'churches' that seem to just worship every word of Paul -- when he appears to contradict the Written Scripture elsewhere, and the instruction of the Author and Messiah to boot -- sometimes just plain ignore what he says even He says? If they don't like it...
PS> Ironically, Paul himself answers that question, in the very next couple of verses. But those who claim to be able to re-Write what He said, because they know better [and hint - it isn't JUST polygyny and marriage in general... ] aren't about to read that either.
Is it still Scripture?