The anti-cheat programs provide uninstall options, but you’re basically just assuming they actually uninstalled and didn’t leave anything behind. You don’t have any control over whether it actually fully removes itself or not, it’s very difficult to verify that nothing was left behind, and some have been caught leaving software behind or reinstalling themselves silently later.
Apex Legends also has kernel anti-cheat, so my point still stands. Also Apex legends famously had people’s machines get hacked through it’s anti-cheat during a tournament.
I’m pretty sure it’s mandatory that any Chinese owned company has to have backdoors and provide access to the government. I’ve read interviews where people talked about running companies in China, and they would talk about how government employees would come and install hardware in all their server rooms, and they couldn’t touch any of it or do anything about it.
I don’t think it’s a coincidence that most kernel anti-cheat are developed/used by companies that are at least partially Chinese owned.