I doubt they do mich different than you do with their OS.
People are more motivated by feelings than actual logic. The person you are responding to even states that Ubuntu “feels good to use”. That is some car advertisement level of feeling based reasoning.
Another thing is that people really hate it when things change. Especially a UI change. Every change in the Windows UI has been met with disgust. And if there is one thing different between linux distros, it’s where they place all the buttons, menus, etc. So people prefer to stay with the distro they know.
Battlebit is great for a couple of rounds of brainless fun every other night. I’m not yet on linux myself, but it seems to work well via proton according to google, and it doesn’t use an external launcher.