In college, I learned that the medical community adopted the term, "doctor," for the prestige, but that the term came from the Latin
docere meaning "to teach." Educators had it first. It was a philosophy professor who taught us that. It was an interesting lecture explaining the validity of professors being called "doctor," but it was okay to call the prof by his first name. However, we learned that to insult a philosophy professor is best done by the accusing that professor of not being a philosopher.
When researching possible top surgeons worldwide for an FOV (floater only vitrectomy) I had in July, I discovered that, in England, many surgeons drop the title, Dr., for the titles of Mr., Mrs., Miss, etc., as a homage to the fact that the occupation of surgeon grew out of the occupation of barber. Teaching surgeons often choose to be called, "Professor." I had the surgery in New York City with a top cataract surgeon with excellent results.
In college, my first lacrosse coach had the name of Jeffery Scott Dougherty Thorud III. The Dougherty was pronounced Doc-er-tee, so he went by "Doc" rather than Jeff or Scott, but it always brought the question as to whether or not he was in medicine. He has a juris doctorate now so it's all good.
I really appreciate many of the physicians, nurses, EMT's and others who work professionally in the field of medicine and are divers. In my experience, they are equally interested in hyperbaric and diving-related medicine as a hobby as they are in diving and are always willing to provide medical insight for both diving and other matters - freely - when around divers.
A doctor taught me to self-doppler for DCS and another caught the signs of a friend's cancer while cave diving. He's alive today.
As divers, we all bring the strengths gained from our occupations, hobbies, and life-experience into the water to benefit our teams and the diving population in general. I think it's great when people go by "doctor" because they've earned it. Even primitive humans found ways of displaying accomplishment. As we "count coup" in life, we give others stars for which to reach because they see accomplishment as attainable with hard work and dedication.