Anti cheat is DRM. It's added specifically to make it so modifications are DRM circumvention and therefore copyright infringement. This isnt to protect the player, but forced by big suit investors to "protect their investment".

The best anti cheat is proper net code. Games rarely do this because it's expensive and difficult. Consumers will buy it anyways.

Anti cheat overtop is like calling an open window with a loud Weiner dog guarding it "defense in depth".