I'll grant there's something to that, but, on the other hand, I feel the "professional fitting" is purchased by a number of people who don't need it (walking into a bike shop, one sometimes sees persons not even sure what kind of bike they want, talked into putting down a bunch more cash because they're successfully persuaded it's "worth it" to be fitted "correctly"). For most bicyclists, my feeling is, the "common-sense fit" is perfectly adequate.

I'd hate to start a flame-war, so I'll move away from this digression, here.