I heard the reason for state wide control of licensing in some cases was local boards set up unrealistic rules to keep "OUTSIDERS" from obtaining a license.
When I have had to activate my business license in remote locations I have run into some arcane rules, no faxes, no emails, must sign the document in front of the person at the desk, no out of state checks, no credit cards, no cash. All possible to overcome, but set up IMO to skate around the state licensing rules to contain the number of contractors in their area.
We always call ahead to minimize issues and get there and rules changed. Had one place that did not issue licenses on Friday.