I don't think they are needed. Cheaters will always find a way to cheat, giving game developers access to low level kernel features under the guise of anti-cheat is definitely not a trade-off I'd be willing to make. If game makers can't solve a problem with mechanics or moderation, I probably would just not play the game. Most of those issues revolve around MMO things, and could be solved with private lobbies, self-hosting etc - i.e. not playing with randos on the internet.