Just because they haven’t been checked yet doesn’t mean they won’t run. About 75% of the games that were tested were compatible with the Steam Deck. Also, all emulators work on Linux too and sometimes even better than on Windows. The number of games that are available to you on Linux is simply massive.
I personally know a lot of bioinformaticians that run linux on their desktops. If you live in the terminal you don’t wanna be bothered with all Windows bs and linux comes with everything you need. Most don’t even care about the DE that much.