alt Hacker Newsanti-cheat is not perfect. they will brick a legitimate user's pc. that is the opposite of "good for their players".
and even if someone is cheating on a riot game, bricking their pc is obviously fucked, and will end up biting riot in the ass (i.e. not good for riot, either).
Which anti-cheat has bricked users' PCs? The Riot example above specifically targets DMA cards (cheating hardware) which no legitimate user will have.