Your point being ? Whatever the platform the vast majority of games are never going to be supported for as long as open source software running on Linux is.

So if the game is successful but doesn't work out of the box players will not bother and simply run the Windows version while the Linux gang will lament how it's not yet the year of Linux gaming. If the game isn't successful the Linux version will die out the same but faster.

Thinking an AAA game that missed its launch might benefit `from the community bug reports` is wishful thinking.

edit: And it's not due to the technological aspects or the software philosophy of the platform, it's about having the money and the time to support a product for a niche platform.