You should hear the stuff soundsystem heads talk about. To be honest it's very similar to the things you just listed, power distro and heat dissipation, plus lots of stuff about managing phase, gain structure, the relevance of SPL metering, scoops versus horns, price/performance ratios for different types of plywood, and so on.

To be fair, I expect it helps that after all that stuff is dealt with, the equipment turns all those watts and volts into waves of pounding bass and hordes of dancing people, as opposed to just pushing bits around.

BTW for anyone who does want to debate pro audio, head over to http://forum.speakerplans.com/