In Australia, to referee at higher levels of basketball (not just pro levels) you have to pass fitness tests and other various testing before they allow you to ref... I just assumed that was the same everywhere and I've got no problem with them doing that anyway, they're getting paid to do it, they're not just there for fun...
How three referee's can miss blatantly obvious calls or make bad calls without another overruling is beyond me and something needs to be done about the system but it never will... Think it's just something everyone will have to live with...