OTOH, there's the dead weight character too. Someone who creates a character purely for concept, but is simply not pulling his/her weight in the game. Now, I'm not talking about someone who is doing 1 HP damage less per round on average than someone else. That's fine. But, I've seen gamers who insist on "playing to concept" who create characters which are very useless. But, if I or anyone else points out that as a group of professional adventurers, whose goal is to survive, we really have no reason to actually cart this dead weight around, now we're suddenly "roll players" who don't care about playing the game right.
There most certainly is two sides on this issue and both of them can be equally problematic. Neither of them is inherently a problem, but, taken beyond a certain point, both sides will cause issues at the table.