I'd argue that the idea that most games don't work on Linux is a flat-out misconception in 2023.

It's hard to quantify, but Valve's own Steam Deck (=running on Linux) verification stats have 70% of games either Verified or Playable (Playable generally means that it runs but text is small on the Deck screen, or it needs a lot of keyboard input -- nothing that matters on the desktop). Crucially, "Unsupported" doesn't mean it doesn't run -- it means untested, and in my experience at least, many of those just work too.

Protondb shows 80% of its catalog with a Platinum, Gold, or Silver rating -- 70% are Gold. Silver generally corresponds to e.g. switching to Proton Experimental, which is a single-click process.

Anecdotally, after being gaming only on Linux for more than a year, with a catalog of 500+ games, I've had one (1) that gave me any more trouble than that Proton Experimental switch (Assetto Corsa, first one).

So there is no "unspoken part" here. The experience running Windows games on Linux isn't what it was even 2 years ago. It is, for many people, an entirely seamless experience now.

PS: seeing Windows games running better on Linux isn't a new observation either. Elden Ring was a great example where Proton shader precaching eliminated the stutter that plagued that game at launch, so it didn't happen on Linux.