Well put, Travis.
You know its funny and anyone who has had a different experience, please let me know.
But, in medical school, I remember quite a few who could talk of nothing else but being a surgeon. Especially ortho surgeons. And, I recall quite a few who couldn't wait to match at an ER residency and have no call, have lots of excitement and make pretty good money. Then, there were still many of us who wanted primary care for the variety and enjoyment of taking care of patients at the gatekeeper level. Not to mention that our medical school (and I am sure others) pushed primary care down our throats. I remember at least three wanting to do ophthalmologists, and they all did. And, anesthesia was a favorite for obvious reasons.
But, I can't remember one first-year medical student at my school or any medical students I work with now who even stated, "I went into medicine, because I want to be a radiologist."
I am fairly sure that the ones who went into x-ray reading in the basement did so after going through their clerkship year and seeing the hours they would have to put in as surgeons and primary care doctors and they money their radiology attendings made.