D&D is a game about both combat and non-combat and when your limited resource can be used for both, they become intertwined. Unless you're playing 4e that has seperate combat and non-combat resource, it doesn't really make sense to look at one aspect of the game without looking at the implications on the other.
I agree completely. I've swung the pendulum too far the other way more to make a point than to suggest that that's an optimal play style. Wizards of course need to balance both. I'm just reacting to the implication I'm seeing through this thread that combat potential is the only source of enjoyment in this game. I concede that a wizard who knows only utility spells is going to be equally boring. I just don't think that every class needs to, or should be expected to, contribute equally in a combat situation. That's one thing that WoW has done to poison modern gaming. Niche roles are really not being embraced at all.