How much should an RPG have rules for social interaction?

[Knaight]

Is it your contention that the 'fundamentally different set of skills' are not useful in approaching the game successfully? Because, if they are, then they are most definitely an aspect of system mastery, or you're defining both words via such non-standard method that I'll have to ask what you think those terms actually mean.

I'm not saying that they aren't useful in approaching the game successfully. I'm saying that they are useful in approaching the setting aspect of the game and not the system aspect of the game.