Why play MnK when you can just play PC
Well, it is kind of OP, but they can't exactly detect when someone is using Mouse and Keyboard. They might false ban people who aren't using MnK. I, myself, have been accused of using MnK by multiple people when I don't.
I don't have a problem with mnk players all the ppl that complain about are stuck in plat 3 and gold. If you were actually good it wouldn't matter if you were playing mnk ppl