While developers surely are, game development companies are not fundamentally human. Now that Bobby Kotick has finished running Blizzard and the FPS genre into the ground, Valve is pretty much the only major publisher left that hasn't been overrun by IP lawyers and MBAs. Minecraft is a great game, but it's not a good representative of the average successful game. Developers make games because they want people to play them, but unfortunately, the only ones who have any control over what they are doing are the indie devs.

We already have indie / casual games on Linux. That's not enough to make Linux a legitimate platform.