The purpose here is to help those developers that have only Mac or can also play Mac versions. I understand some of you have used WebGL. I know I can play it in the browser. But if I take the time to rate your game, but you won't help me or can't help me because you can't play Mac, then what is the point. My time is important, just like yours. I worked hard on my game, just like you.
If I see that your game is WebGL, but you are unwilling to help fellow Mac users, then I won't rate your game. Best of luck!