Probably the best, deepest LGBT+ issues discussions I've ever had have been on their /lgbt/ board. They were filled with people yelling obscenities too, but that doesn't bother me. I guess it's the culture I grew up with, it's natural to engage in discussion while people are yelling around me.
I'm really glad there's still a place out there that believes in free speech as a foundational principle not to be infringed upon except as an absolute last resort. I'm glad not everywhere is 4chan, but 4chan is a gem of discourse in today's world if you ignore like 90% of it. I'm increasingly convinced that that 90% is the inevitable cost of the wonderful 10% that represents the sharing of intelligent thought without fear of reprisal.