I could be just as stubborn and refuse for lock picking to be changed. People complain about things like that, and it's quite hypocritical. The only difference being, your paranoid visions of Skyrim being less of a single player.
It is religious for some of them, but not in a good way. It is fanatical for some of them. . . largely illogical and yet fervid. You are a heretic to want to play other than their way. Such foolishness. If the game can be done with all the features that the devs intended for singleplay, and still have a basic co-op (local, drop in drop out is the best example to my thought), then it would be magnificent and in no way detract from the experience of singleplayer enthusiasts. . . yet I think some of them would still be angry about it. Not for any sensible or decent reason. Nay. They would be angry about not having the final say, the last word, the absolute truth. . . angry that heretics should be suffered to live, we heretics who hold to the true origins of RPGs with the co-operative play the early games almost inevitably involved, and with all the pleasures of interaction and shared experience that accompanied that.