Agreed, but I think the mechanism relates to different microbes. If there are two microbes in your gut, and type A requires a dose of high-calorie, low-fiber food coming down the pipe every day, and type B is not able to reproduce as fast as type A but is able to live on high-fiber food, this tells you two things:

type A cannot have been living in humans thousands of years ago, but type B might have

type A benefits from making your brain worse at choosing healthy foods, and type B does not

Which kind would you rather have in your gut?

Roughly what I follow. I pour chia seeds into everything I eat. Also: edamame, goji berries, green peas. Etc etc. My particular motivation is 1) health, but 2) I lift quite a bit and try to get as much protein from food as possible.

To do this eat stuff that grows and not further processed.

Let me also introduce you to the new kid on the block, the resistant starch: https://www.youtube.com/watch?v=U6IcMW5Khh4

The post is about a scientific study and your response is your opinion with nothing else to back it up?

> eat what you like and be sure to get a lot of fiber each day

Sure sounds like another fad diet.