That's completely true, but from the point of view of a user who just wants a working system, also completely irrelevant. If I were to recommend Linux to my mom

That's completely true, but from the point of view of a user who just wants a working system, also completely irrelevant. If I were to recommend Linux to my mom she wouldn't care why exactly her computer doesn't work correctly, she only cares about the fact that it worked on Windows and doesn't work on Linux. I hope that as Valve pushes people into gaming on Linux, things will slowly change.