PC fag here
I spent like 600 on my PC in late 2019/early 2020, basically just before Covid hit.
I play on 1080p and I honestly can't notice a difference between most settings beyond medium. Like someone can point out the shadows are a bit crisper, the smoke looks a bit smokier I guess and shit like that, but it's nothing I notice when I'm playing and everything is in motion. I've actually watched my friend plays some games on Ultra in 4K and I think it actually looks *worse* because I can notice awful looking LOD models and shit in the distance in a lot of games.
Maybe it's just because I've gotten old, but yeah, I think people spending a lot of money on a gaming PC these days are kind of retarded.