The whole PC Masterrace bullshit of "anything is good ..... as long as it's on steam - otherwise it sucks" is just passe and lame.
Is there anything wrong with someone favoring a specific outlet for their gaming?
Also, while they don't speak of Steam often (which is weird as you seem to say they do it all the time), I believe it is worth mentioning that Valkyria Chronicle sold gangbuster on Steam on its first week.
Why would we be against Sega making their game available to a broader audience? There apparently was a clear demand and the money doesn't lie.
With any hope we'll see more of those.
(heck, I'm super thrilled myself that the recent musou games are available on Steam now. Do you know how much of a pain in the ass it was to get those games? ok... now that much of a pain, but they were 90$+ because of import)