For me it's a question of math. If I want to purchase A, B, C, and D with X amount of money then paying too much for A means that I'm not going to be able to swing C, and D. I'm dropping approx. $5K worth of gear on my daughter's studio. If 1/5th of that went to flush out Apple's bottom line then there would be some serious holes elsewhere.
And the issue isn't whether or not IBM PC compats need to be 'optimized'... I've never optimized shit. It's simply that the IBM PC compat universe is wide open so people fiddle. Apple is a closed garden that doesn't empower you to 'optimize'.