You don't need a driver to read that kind of data anyway, so your concerns are moot. Once you install any application on your PC, there's not a lot that it can't access.
It's super easy to run games as a user without access to important data. It's possible you could make that completely seamless with bwrap and gamescope for an embedded session, but I haven't looked much into that.
Of course no security tools work if the game is root.
Of course no security tools work if the game is root.