It s a recommendation and not a law. Flatpak said they will look at it on a case by case basis. I think it s more related to analytic and nvidia doing nvidia and doing all they can to not play nicely in the foss ecosystem

It does offer less protection. U dont have kernel access, ring 0 how it s called on windows. Apex was availlable under linux and cheater start identifying their system as linux so the protection were less agressive. At the end apex drop the support