I never watched much AGDQ, aside from a few Cosmo speedruns (which are actually quite good), is it always a bunch of awkward kids sitting on a couch saying inane shit?
Oh please, you're not even looking for an answer to this; you've already made up your mind that the speedrunners at AGDQ/SGDQ are as you characterize them. So your sample size is around three (Cosmo, Trihex and maybe someone else) and you start making assumptions. Lay off it.