I do think it helps to know more than just the generic "doctor" title.
I would not want to be operated on by someone with a PhD in philosophy.
I agree. A resident in hospitals, a GP in surgeries, and then psychiatrist, cardiologist etc. I am pleased that they are no longer being called junior doctors.
Alphabetical Flora (trees, flowers etc)
Alphabetical Fauna (mammals, birds, reptiles, fish, insects etc.)

Looking back on the way his entire team looked after us both I would have felt it was very insulting to refer to any of them as Juniors.