Don't agree with that at all. I have over 300 Linux games on Steam, and there's a wide variety of games. Sure, it's lacking the big AAA releases that make the headlines, but in my opinion, those are the 'cookie-cutter' type games that don't have much intellectual value. There are many indie and small developers creating interesting games, and with Unity and other big engines supporting Linux now, it's a relatively small hurdle for them to release their games on Linux, and there are many of them.

I also had a GPU passthrough VM setup, but the only time I used it in the last year was to play Overwatch - a cookie-cutter shooter. I play the occasional game in Wine, but there's no shortage of engaging native Linux games.