Anti-cheats aren’t very effective on PC. For example EasyAntiCheat us known to be the easiest to bypass. These aren’t software level cheats, they’re hardware level and then translating inputs into new “valid” looking inputs. This is next to impossible to detect from client or server side. That’s why this has to be done.
No black box cheat detection has been widely worked out yet. Multiple games have tried to varying degrees of success, about this issue particularly. It hasn’t worked, that’s why more extreme measures are now being taken.
There’s no downside other than shitty controllers and cheating controllers being taken off the market.