You may be right, but Nokia still had a fat chance of comeback with MeeGo, as already proved by Nokia N9 (I own one, and I easily claim it to be better than most, if not all, of the current smartphones due to its intuitive Swipe UI).
Who was saying no to building Windows smartphones? But Elop apparently wasn't satisfied with only that. He had to kill the burning platform (Symbian) as well as the blooming platform (MeeGo). That is what has pushed Nokia off the cliff, IMO.
I may seem to blame Microsoft (I actually do it inside my mind, though, having been a genuine Nokia fan since I became aware of phones), but the fact still stands that Elop cruelly slaughtered any remaining chances that Nokia had, with or without Microsoft behind him.