You missed the boat on this one....and I'm guessing it's because you're a non-physician.
What this thread is about (once you distill away some effluvium) is the misapplication of a title that (regardless of historical derivation) is known to the public as the title of their health care provider.
It's confusing and misleading to people in compromising positions to have someone who is to their knowledge a pharmacist, nurse, or allied health professional come into their room and say, "I'm Dr. Jane Doe/John Doe" and not qualify the statement with what theire degree is actually in. It's easier to walk in and say, "I'm Ray, your dietician." As opposed to, "I'm Ray, your Doctor of Dietetical Sciences." The patient would invariably respond, "Are you a doctor or a dietician?" After 10 minutes of intense conversation, you'd end up with, "Oh, you're a dietician, not a doctor."
My grandparents didn't even speak English most of the time (Cajun French was their chosen language) and they understood doctor to mean "healer...head of my health care." Not, "filler of my prescriptions"...that to them was "Peter Wolfe." Not, "physical therapist"...to them, that was some other person they knew.
The same is true for many people today...especially those marginalized citizens with inconsistent access to health care. They lack the sophistication to differentiate between a Medical Doctor/Doctor of Osteopathy, Doctor of Chiropractic, Pharmaceutical Doctor, Doctor of Physical Therapy, etc.
So, in the broader sense, "Yes, we are all doctors."
However, to 70-80% of America, only those who admit and prescribe are their "doctors." The rest are well respected, and needed...but known by their function. "The Nurse." "The Physical Therapist." "The Chiropractor." "The Dentist." "The Foot Doctor."
Maybe eventually our collective sophistication will become such that average Americans will understand the title "doctor" as "teacher." However, it's false advertising to the current group of patients.
And if you think Medial Students have big egos, try becomming one...
How can you tell who your attending is? S/He's the one who makes you go home crying every night.