Police are an obvious special case, and have special laws around it. As for physician or lawyer, people generally have no idea which terms are protected, so it

Police are an obvious special case, and have special laws around it. As for physician or lawyer, people generally have no idea which terms are protected, so it tends to be a bit meaningless. There seems to be something of a permanent argument over who gets to be called "doctor", so even people in the industry might not know if it's meaningful: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5026525/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5026525/