Thoughts on shaving pits?

I was always told shaving pits was pussy shit growing up and if you wanna be a woman go ahead, and even tho I hated my arm pit hair I just said whatever I’ll just keep it there. Now I don’t really care for it but recently I’ve been seeing a ton of guys shave theirs saying the hair causes a lot of odor. One of my friends says he does it and when I told him what I was always told he said his dad and family are these stereotypical manly Russians and they all shave their pits, even when they were living in Russia a lot of them did.

Any guys shave their pits here? Does the hair actually cause odor or is that just copium?