While I agree that police need more training and psychological evaluations... How much of this is because job training schools lobbied for needless licenses and things to be covered under those licenses? Does someone really need 1600 hours of training to cut hair?
It differs state to state but being a barber and cutting hair are not the same thing. A barber's license is one of a few different ones used to get a job cutting hair. The thing that barbers generally do that others don't is provide a shave. Use of a straight razor along with health and safety is part of the training.
For context a full time bachelors student is pulling about 600 hours in one 15 week semester.
You can absolutely use a safety razor. Best haircut place I ever went to for my military cuts did so. If it's a scissors and buzzers cut, anything over 40 hours is just exploitation.