Comment by CydeWeys

If anyone is wondering by barbers require licenses in all 50 states, it's for both historical and public health reasons. On the historical front, barbers were previously something akin to doctors, performing a variety of tasks that we would now say are the responsibility of doctors and dentists. On the public health front, barbers deal with dangerous chemicals (hair dying), infectious diseases (lice), and tools that can be deadly if mishandled (razors). Training is necessary to minimize these risks.