If this fully pans out, as I think it will, nutritionists of the past fifty years or so are going to have the unenviable task of being used as an example of how an entire discipline with billions of dollars in funding and the best possible science apparatus can get it horribly, horribly wrong for a very, very long time.
If history is a guide, within 30 years school textbooks will read as if this was just a logical conclusion and was easily reached -- instead of the brutal infighting and confusion that it actually was.
One of the weirdest things I learned as an adult was that science does not progress linearly like they teach in school. Instead people get emotionally attached to ideas, and miracle of miracles, the evidence shows they are correct.
Until the evidence shows they are not. Then it's this long struggle for changing gears, finally ending up in a spot where nobody ever talks about what went on before.
I think the human part of science is at least as interesting as the science itself. Lots of complexity and randomness, yet parts are very predictable. Neat.
You, me and my pet monkey can all start calling ourselves nutritionists tomorrow, and charge money for ridiculous dietary advice.
Dietitians, on the other hand, are certified professionals and actually say things worth listening to. Any time I read anything quoting a nutritionist, I stop reading immediately, as all credibility is lost.