Re: Knowing how to pitch
I don't think there is a "knows how to pitch" in the absolute sense. It's not just a fact like "a 94 mph fastball should be located at the knees on the outside corner" because if that's what the guy is looking for, it's not going to get him out. Rather, it's a guy being able to use his stuff for maximum effect. The specific "what" isn't fixed -- It varies from one pitcher to the next.
Knowing how to pitch and having great stuff are independant. You can get away with just having amazing stuff (Kerry Wood) or just "knowing how to pitch" (Jamie Moyer), but the best pitchers do both (Johan Santana, Roy Oswalt). The advantage of knowing how to pitch is that it doesn't go away -- great stuff does; just ask Greg Maddux.
Games are won on run differential -- scoring more than your opponent. Runs are runs, scored or prevented they all count the same. Worry about scoring more and allowing fewer, not which positions contribute to which side of the equation or how "consistent" you are at your current level of performance.