Anyone in a licensed field knows to be very careful with terminology.
Try calling yourself an Engineer on the web. The State will send you a cease and desist letter if you are not a currently licensed engineer.
Same with calling yourself a Lawyer or a Doctor. Everyone in the field knows how they can refer to themselves properly.
While many feel that licensing boards are corrupt or play favorites, at least in most fields they perform a valid function to keep out charlatans and con men.
Absolutely true!