I guarantee you'd never see a metal fest with such a progressive goal.
It's not like there are a ton of socialist/communist metal bands or anything
(note: I'm listening to Rammstein right now, a German industrial metal band who has a song in which the lead singer repeatedly says in German "my heart beats left" and refrences a marching song by Bertolt Brecht)
Do they promote such SJW type things? Would any metal band ever challenge concepts of masculinity?
I feel like the whole wide wonderful world of female-fronted metal bands and visual kei bands with deliberately ambiguous gender presentation not only answers this question but makes it a whole lot stupider than it would initially seem to somebody who's ignorant about metal.
How does this challenge concepts of masculinity?
Also I just can't imagine a metal band ever including an insert like this in one of their records:
or any metal lyricist willing to call out himself for sexist behavior like in this song. Because this is EXACTLY the type of stuff that I saw people on metal forums make fun of in their "haha let's all laugh at those PC idiots in hardcore" threads that I saw reported on some of my forums all the time...
LOL at those people being "ignored" in society. Those people control society, anyone criticizes them it's considered hate speech or harassment, meanwhile they say everything they want about anything with no repercussions because they are "oppressed"