Well that is quite the charmed perspective on life you have, a specialist for every question available when needed. Many don't have the access you do and a yearly chat with their primary care doctor goes a long way for their health.
A "yearly chat" with a primary care doctor does little or nothing for the health of asymptomatic adults. Did you even read the article I linked above?
Please take the win you did achieve, you identified a dietitian is the right person to talk to about your diet, bravo.