Recent testing revealed that Arch Linux, Pop!_OS, and even Nobara Linux, which is maintained by a single developer, all outstripped Windows for the performance crown on Windows-native games. The testing was run at the high-end of quality settings, and Valve's Proton was used to run Windows games on Linux.
Yap, ProtonDB give us a good picture, mostly games still have minor issues. But, I like this kind of thing because show potential. If gamedev do they homework, the Linux experience could be better performance.
You are right, these experiments really show that Linux is suitable for gaming, just some games aren’t running on Linux.