Yeah, right, but you still need to start it at least once in online-mode to put it in offline mode. Your argument is invalid.
Not necessarily true. I've booted up my computer dozens of times without internet access, and every time, Steam says "we cannot connect to the internet, would you like to try again, or start in offline mode?"
Wheras I will buy the game whether or not it requires Steam, I would prefer if it didn't. Even though I do like Steam features, I would want it for the people who don't have it.
That said, if I were Bethesda, I would sell a "Steam Collector's Edition", which ships the player a copy of the Collector's Edition, but ALSO gives him a CD-Key so that he can activate it on Steam, preload it, and play the moment it launches.