I can’t speak for brendo, but I do most of my gaming on a separate PC-class machine from my home workstation, both of which are separate from my work laptop and personal laptop.

I game primarily on my Linux PC, including multiplayer games. I do have a PS5 and other game consoles, though honestly, they see more use as set-top boxes than they do as gaming devices. I have a separate Windows laptop for work.

But not with a separate user? As a process running under your normal user can access all your files and even memory of all your running processes by that user. Its not just kernel stuff that is bad.