I think if anyone passes any professional licensure, they're qualified...atleast at the minimum. They'll do fine.
The hardworkers, those with real drive, and those who demand perfection of themselves, will, in the long run, pull ahead of the others. They'll be the "experts" in their field, they'll own their own practices or be partners, they'll have the longterm clientele/patients/customers.
I think for most cases, any licensed professional will be adequate. However, if we're talking brain surgery on my wife or kids or something like that, then yes I want to see additional credentials and/or expertise or experience. In those types of cases, a proven track record speaks volumes to me.