I am one of a few that don't believe in size matters in footy. You can still be small and go in like a mad man possessed and win the ball.
Exhibit A Baker
Exhibit B Bolton
Exhibit C Edwards to an extent.
Size doesn't matter in footy. What the...strongly disagree.
If you saw those 3 players stand next to Naish you would see the frame of men vs the frame of a boy.
I think it's a combination of both with Naish. He lacks the frame for the level combined with a soft attitude of avoiding contests.