I understand what you mean but you must realize that a SF has to have at least some decent outside skills.
In BB (I don't care about real-life here), in your opinion, is a better SF more outside-focused, inside-focused, or balanced? I realize that there are a lot of dependencies (tactics, opponent tactics, matchups, etc.)
In my opinion, all things being equal, the answer is balanced. Then you tweak from there depending on your own tactical goals and your understanding of your opponent.
Now I'm probably reading too much into what you're saying, but I believe that our current NT braintrust feels that a SF is outside-focused. That would be consistent with the player choices I've seen. It would also go towards explaining uflorin's dismissal of Look Inside as a viable tactic... if you play what's effectively a third guard as a SF at the NT level (which is precisely what we did here:
(1758)), it's no surprise that Look Inside wasn't too effective.