Cheaters aren't only aimbots. In fact, most of the time they're not even using aimbot because that's one of the easiest one to tell that someone is cheating. Most of the time they can just see everyone through walls. But if it's cheater vs cheater and they don't care about being caught then it's not fun or interesting because you just use aim + speed + noclip (I assume that's possible) and just kill everyone the second the round starts.