To my understanding the graphics drivers modify the rendering pipeline after the draw calls are made, they don't actually hijack code within the game and modify

To my understanding the graphics drivers modify the rendering pipeline after the draw calls are made, they don't actually hijack code within the game and modify it's logic. Developers of games add api calls to their game engines for things like antilag/nvidia reflex, that if enabled will notify the driver and allow them to do their thing before returning back to an unmodified game. You do not modify the internal game state - that's a straight red line. There's lots of places you _can_ generally hijack, such as the final rendering calls which is how most overlays work. I don't think whitelisting drivers is common either for the same reason cs2 doesn't allow userland applications to be whitelisted - you can potentially hijack that application instead and then your cheats will be whitelisted.