Thank you Eric!
The author targets just what you said, fiber from grains and of course the fiber supplement industry. The thing is there is absolutely no other source I have ever come across that says meat does not disrupt the functioning of your bowels. So if he's right, what a mass lie bring told in about every arena of dietary theories.
I've also read that if one eliminates all other foods except clean animal foods for a period of days, the body's intestines have a chance to cleanse and reset . This is so far off from what most gurus say "meat rots inside you, stops up intestines, if your not eating it with fiber to push it through...."
Interesting, but not surprising, about your friend in Africa .
Personally the only source of fiber I feel physically comfortable after eating is sweet and non-sweet fruits. Vegetable fiber acts like grain fiber in me, upset spastic gut. I eat very "wai" like (raw fish, eggs, and fruits) but I'm considering giving my intestines a good break so that means eliminating fruit for a few days, weeks, or longer.
Im so much better the last several years if allowing my body to be the guide, not health experts, but I still find myself having to work out the brainwashing I took in for a very long time, decades of eating lower fat plant based vegan (bulk based meals with lots of natural fiber) and the diet industry that followed with lots of vegan propaganda that animal foods and there fats cause cancer, heart disease, Etc....