Some States have been lobbied by so many special interest groups that want to keep their profession hard to get into mandate that you have to get certified and licensed to do almost anything that isn’t even specialized. It works for them to keep their prices high, gives the community colleges enrolled, and the gov’t happy with the fees that have to be paid (and more gov’t workers to enforce everything). Accountants, doctors, and lawyers make sense but not hairweaving or lemonaide stands.
A hairdresser’s licensing requires learning some sanitary things you want mandated.