How much should an RPG have rules for social interaction?

[Segev]

True, but the point I was trying to make is that different systems have different standards and different people have different preferences as to how that interaction should function.

I've no problem with that. I only object to "this game will focus on this aspect of your characters' activities, and as such the mechanics will be 'how well can you, the player, do these activities?'"

This can happen with supposedly-rules-light resolution systems as much as with genuine free-form. To me, a game system's mechanics should have significant depth (which doesn't necessarily imply a lack of simplicity, nor does complexity necessarily imply depth) in the areas where the majority of player character activities are to take place.