The other part is, lemmy hides content from you unless you have the language enabled in your settings, and so, I have all languages enabled just so I can see all the content. And that makes navigating the language list really unwieldy without a default option
An analogy is that operating languages speak different languages. And an app built for one operating system doesn’t speak the language of others.
But in the case of Linux, there are lots of really good tools that let Linux understand Windows apps. Steam has those tools built right in.
Where it falls down is that the tools that let Linux understand and run Windows apps aren’t perfect. So things like DRM, anti cheat, propriety drivers etc, can be a challenge.
But currently, if you’re not running games that use kernel level anti cheat, the vast majority of games will work on Linux. The steamdeck uses Linux itself, so it’s a high priority for valve to get as much working as possible.