Many licensing laws are nothing other than incumbent business protection rackets, intended to prevent or limit competition.
Do you care most that your plumber has a “license” or that your plumber does good work to the best standards at what you think is a good price?
We had licensed plumbers out to get the drain working on the master tub. All they did was stand around scratching their heads and charging a big bill. A decade laster, still can’t use the master bath.
See reply #85.