And worse is that the only reason I have windows in the first place is to play games. I don't need to do anything else on it, but I have to have it in my life because big game companies will not make games for linux. Hell, I'm so excited for Oculus Rift, but at this point they have even dropped Mac support (understandably, they don't have the graphics power), so if I want to experience VR currently, I'm completely limited to windows, not even playing indie and valve games on linux.
Which is fine by me - I consciously choose to boot into my gaming PC and start up Steam. My gaming friends are a small fraction of my friends. And spending habits are pretty easy as well - basically whenever there is a major Steam sale. And you are still able to play a lot of games offline.
My point with the above is that the risks are far less than with a general purpose operating system. How can I ever trust Windows as a platform for running the Tor Browser on? How could I trust any closed system?