Why would games like PUBg have to GPU ban so many people if it wasn't a serious thing. I've know idea why people cheat in MP games though, and SO many of them too. You can deny it all you want, for whatever reason you have (I don't know why) but I don't believe for one second you haven't met hackers on the regular if you put significant time into games on the PC. It's blatently obvious, maybe less so with games that don't have kill cams but with games that do or even Overwatches play of the game or similar systems it's in your face clearly. Even outside of those games you should be able to identify it. I haven't really played MP games much on PC the last three years or so but I doubt the methods have gotten anymore sophisticated.
Because they take cheating very seriously, hence the bans. But just because they are banning cheaters, doesn't mean to automatically say that every single game of PuB is filled to the brim with cheaters. Same goes for TF2 and other games out there.
People cheat because they want to feel like they have power over others, with no chance for them to be retaliated against. The other reason being to troll other players and ruin their fun (Some people are just wired that way in all walks of life).
I don't need to deny the fact that cheaters do exist. It's the assumption that all games on PC are filled to the brim with cheaters.
You aren't me, and you do not see through my eyes, so you cannot account for what I have actually seen. I haven't come across many hackers throughout my years of playing both co-op and MP experiences. Certainly not in the number that some other folk have come across.
Well you should start playing MP games on PC sometime, rather than going by a dated experience from years past.