kernel anti-cheat are notoriously inefficient and are weaponized by hackers.
And I have yet to come across an anti cheat driver of the big publishers (EAC, Faceit, Javelin, Vanguard) being exploited and allow access to r/w kernel memory. It is more likely that the driver of some hardware is being exploited for, rather than anti cheat drivers.
Personally, I only remember the ac driver of Capcom ever being exploited. Compare this to the dozen hardware/av drivers which were exploitable, like the Intel LAN utility driver, ASUS IOMap64, MSI NTIOLIB or that one Razer driver. Oh, and CPU-Z and the Avast Hypervisor driver were exploitable too and allowed r/w on kernel memory. These drivers are way more likely to be weaponized than ac drivers.
Video games are not engineered to withstand sophisticated hacking attacks which is fine mostly since the bad guys can only use their access to cheat - in this case they could fully compromise your system thanks to the kernel access of anti cheat