There are many windows machines that never run any game (corporate issued work laptop for example). What this says is that Linux machines are more likely to be personal machines in which you can play games.
What this says is that Linux machines are more likely to be personal machines in which you can play games.
What this says is that among gamers using Steam, Linux is at 1.9%, that's all. Maybe I'm misinterpreting what you said but I don't see how you draw your conclusion.