I don't disagree, but the reality isn't so simple. There aren't enough card-carrying anatomists to go around (not by a long shot), and their numbers continue to dwindle each year. Anatomy graduate programs
still exist, but the don't attract enough students to meet demand. Hence, medical schools all across the country have had to rely on people in other fields (like physical therapists and anthropologists) to close the gap. Using physicians to teach anatomy is possible, but it's hella expensive and you end up relying on part-time faculty of variable quality.
With a PhD in anatomy you can always find an academic job that pays decently. Aside from the wondrous joys of teaching medical students, I'm not sure why more people don't do it.