You are correct about this of course. And getting too fat is bad for your health.
A few years ago I had appendicitis that I tried to ignore until it almost killed me. Because my appendix had been ruptured for a week before I went in, I had a considerable amount of fecal material in my abdominal cavity and a bad infection had developed. The surgeon told my wife that there was a good chance that I would not make it. To save my life they had to remove my intestines and wash them and everything else in my abdominal cavity with antibacterial cleaners and they packed me full of antibiotics.
The procedure and the antibiotics saved me, but the balance of good bacteria in my intestines was very screwed up and I had a hard time completely digesting lots of things that were not a problem for me previously. I tried taking various probiotics and various foods to reestablish the bacteria that I had before. The thing that I discovered the hard way is that you have to eat a balanced diet to feed and maintain a good balance of bacteria in your gut. That is something that seems to be missing from many of these discussions. If you do not eat a wide variety of foods the bacteria in your gut which is turns out is a very important component of health will suffer.
Many people who try to take some sort of metabolic shortcut by completely cutting carbohydrates out of their diet often lose some weight but cause suffer from other health problems as a result. Other types of unbalanced diets have bad consequences as well. The study cited in the article reaches some valid conclusions about high protein diets. Any diet that is not diverse enough to support a healthy gut genome is probably a mistake.
I'm a big believer in what you said.
A varied diet is a healthy diet. I have felt so much better since I started regularly including a variety of veg, nuts, and fruit along with a reasonable amount of meat. I also started mini fasts, eating one meal a day. That works for me.
“In a nutshell, prebiotics are a type of fiber. They are undigestable plant fibers that feed the probiotics or the good bacteria already live inside the large intestine. The more food, or prebiotics, that probiotics have to eat, the more efficiently these live bacteria work and the healthier your gut will be.”