I like Linux, so I use Linux. Before Steam came to Linux, I didn’t play many games, and now that they’re heavily investing in Linux, I’m playing a lot more games.
It’s really that simple.
Here’s my story:
Someone gave me an Ubuntu install disk at college, so I dual booted it on my rented computer; Windows died, so I switched to Ubuntu for the rest of the school year
I declared my major as CS, and the lab computers ran Fedora Linux, so I installed it on my new laptop; it worked better than Windows (Vista at the time) for class work, so I kept using it (I needed Windows for a class, so I ran it in a VM)
I switched to using ViM and fell in love with the terminal
I eventually tried Arch and decided Windows really wasn’t for me since I liked the control
Steam started supporting Linux, so I all of a sudden had a bunch more Linux games to choose from (I had mostly been playing Factorio, Dwarf Fortress, and Minecraft, and StarCraft in WINE); this was before Proton, yet it was still a big deal for me
I’m now on openSUSE, but my experience during college showed me that I really want control over my system. Proton is also a thing, so I’ve picked up a ton more games from Steam.
If games stopped working on Linux, I’d just stop playing games. It’s really that simple, I pick the OS first, and games are secondary.