Of course not.
There are two different arguments going on here. My statement about Dungeon Siege 3 specifically was that I'm easy going, I'll just plug my xbox pad in and play it that way. As long as the game is good I try not to be picky. Yes, they should have done a better job on the PC controls and menus, certainly.
The second comment about controllers being a part of PC gaming from the start was directed to couch potato's comment that he never uses controllers and playing with a controller means I might as well play on xbox, or whatever he said. That's a silly statement. Like I said controllers have been a part of PC gaming from the start and there have always been games on the PC that really need a controller to be played well. DS3 should not be one of them, but any racing game or platformer certainly is.