Here's the thing: It's pretty easy to chat with a bunch of experts and test your hypothesis.

In fact, I've recently done so owing to some recent health issues. As best I can tell there's almost no consensus among experts aside from "everything in moderation" and "eat a balanced diet" which isn't directed advice as much as hedging.

I have asked the various experts I've talked to why advice is so varied and their answer is that there is no consensus on many of these issues. Some had their own opinions about which parts might be right, others were clearly in the "it's a mess, just don't eat too much and wait and see" camp.

This is not a well developed field.