Actually your comparison is weird too, considering you didn't explain what a dietitian's competence in a dietitian's professional role has anything to do with Paleo dieting.
Can you explain?
Can you also explain why some of the best physiques ever built didn't follow a Paleo diet. I mean that's strange too. You got Dorian Yates eating several pounds of rice, pasta, lentils, and dry cereals, and he managed to be a top notch Olympia competitor, let alone a winner.
This whole convo has gotten strange.