Originally Posted by
GooeyChewie
The point I was trying to convey is that both background and class go into the development of a character's identity. It doesn't really matter how your character got a skill; the fact that your character got that skill contributes to their identity. Even mechanically, once you have them the game makes no distinction between skills you got from your class, skills you got from your background, and skills you got from any other source.
Let's suppose WotC did remove class skill lists. A Wizard who got Nature as one of their "class" skills wouldn't defy the Wizard archetype any more than would a Wizard who got that same skill through their background under the current rules. In fact, I would argue that the Wizard who had to get it through their background did more to defy the archetype, since the Wizard with no limits on their class skills effectively has no skill archetype to defy.