I teach my children how to argue politely.
So there are ways to convey a different opinion that take the heat out - play the ball not the player, accept differing views courteously.
If no consensus can be reached, acknowledge this, & try to terminate the discussion on good terms or at least civil terms - leaving the door open for resumption at a later date is also good.
Learn to code switch - chatting casually to friends, v edgelording discussion online, v serious conversations with people you agree/disagree with, v careful professional conversations with consequences all require different strategies.
There are times when it's not productive to have an argument, & it's fine to shelve it.
If you're losing an argument - honestly, is that because the other party actually has a point, or is it because you haven't researched properly so you can't substantiate your perfectly reasonable position?
Politeness isn't ever to be confused with acquiescence, & no one should ever be taught or encouraged to lie.
Being able to research, conduct, win, lose or draw an argument with both confidence & grace is a vital life skill.
So I'm not massively sold on this whole hand wavey 'goodness why are kids being RUDE' when they're expected to kowtow to other people's pronoun piffle. I'd absolutely expect my own dc, & my gender critical students, to a) question the fuck out of it b) agree to disagree & back off politely if someone was upset c) form their own opinions.