I, too, read this book in the 80s, and was impressed with the science of digestion, and the little behavioral things people get stuck in. I had been using his non-combining methods and had no problems. Then I got married, and pasta with meat was a regular. I soon developed diverticulosis, later indigestion, acid reflux, with their prescriptions of a lifetime on drugs. I went back to Fit For Life, stopped eating late at night, and started sleeping on my side, and have no more issues.
What always has pissed me off is how people buy into media-mindsets, which go black and white into 'fads,' 'diet books,' 'fringe,' 'kook,' 'lunacy,' and now 'conspiracy theory,' turning people off before they even look at a book or idea. Our labeling is the start of the dumbed-down nation we have become.