A lot of work gets done outside of that framework, and licensing in many places is not all that onerous. It depends on the location and the field, and there is

A lot of work gets done outside of that framework, and licensing in many places is not all that onerous. It depends on the location and the field, and there is a difference between the commitment level of learning a trade as a backup and personal development step and getting really serious about making money in that trade.