I don't really think it's the reason that gaming options for linux are as slim as they are, but it is certainly true that OpenGL lags behind DirectX. The OpenGL people spent a long time doing nothing, and during that time DirectX took the market.
If you deploy Linux, OS/X or any other operating system and hand over the root password (or sudo access) to a typical *user* it will get messed up too.
This is one of the huge differences between windows and linux. On windows you have to actively lock down the system to prevent the typical user from shooting them selves in the foot. On linux you just have to not give them the root password
This is a good time to punt work.
