Put Fedora gnome workstation and be done with it.
Heck, put Linux Mint XFCE and I guarantee he wont even need to reinstall the OS unless the hardware breaks
I also don’t get it. How many people realistically only use their desktop PC for gaming and what’s the benefit of using a “gaming” distro if the same can be achieved with minimal amount on a more versatile distro?
I’m not sure if CachyOS counts as a “gaming” distro or not, but I use that on my desktop/work machine. I’m pretty familiar with Arch (BTW) and I can do a manual setup from scratch if I need to (that’s what my laptop runs) but Cachy just seemed like a way to use Arch with a simple setup and a bunch of default optimizations. So tl;dr laziness I guess lol.