I've never seen HS lines drawn like that. The batters box usually starts one ball width away from the edge of the plate. Just think if you're an umpire, you get paid per game, but you have the power to maximize your per hour wage. You could typically either be making $37.50/hr or $25/hr. If you were to call a perfect game, you'd probably make $18.75/hr. So the bottom line is how much money do you want to make, right? Every ump has the ability to call a perfect game. In every scrimmage we've played where coaches are the umps, we've called great games with absolutely zero complaints from either side. If a coach can call a proper strike, obviously a "pro" umpire should be able to. That said, don't ever leave it in the judges' hands. Swing the damn bat