Authoritarianism is all about concentrating power around fewer people. That what authoritarianism IS. Giving more power to the least powerful people is always anti-authoritarian. Yes, there are always trade-offs, no they’re not always as obvious as this one, but more power to more people is never authoritarian.
Do not take dietary advice from randos on the internet, yes, but also unless it’s in relation to a medical condition or you are talking to a professional nutritionist don’t take dietary advice from your doctor either. Med school teaches basically nothing about nutrition, and it’s pretty sad how often you can figure out when a doctor went to med school by which fad diet they recommend.