Because it isn't addressed in the anti-cheat policy. The anti-cheat policy contains information about when you get banned for cheating and how long the ban will be. It is common sense that you should not cheat. If you have to inject something into your game, you're doing something wrong.
We're not obligated to unban you either, and I am glad that you are no longer able to play especially after getting banned for cheating twice. I don't get it, why would you make the same mistake again after you've already been banned once?