The industry maliciously amplifies our innate tendency to find a "one-fits-all" solution. The bogeyman used to be fat, now it's sugar. Soon, people will realize that getting 90% of your caloric intake from protein powders is bad, the industry will get ahold of the new trend, and they'll start going back to "healthy carbs" or something stupid like that, and people will forget the meat rush of the 2010s and move onto s…
That isn't a fad though, that is progress.
> Soon, people will realize that getting 90% of your caloric intake from protein powders is bad
This is obviously already true. You would get protein poisoning very quickly long before you hit your TDEE.
> the industry will get ahold of the new trend, and they'll start going back to "healthy carbs" or something stupid like that
No they won't. "Healthy carbs" will be a part of moderate diets for a long time, but sugars or white flour won't come back as your main caloric source through any reputable study. Mark my words.
There will always be fads, but let's not pretend that blaming fats decades ago was the same as blaming sugars now. Also notice that it's explicitly sugars, not carbs. Breakthroughs always lead to regular people overcompensating when swinging over, so you get things like your mentioned "meat rush", and people eating bearnaise sauce and pork belly with their bacon wrapped broccoli or whatever.
But let's not portray the underlying studies that led to this swing as merely fads. It's progress, and while it's not solved, it's a lot better than just 10 years ago.
Edit: I was reminded of this article "The Relativity of Wrong" [1] by Isaac Asimov. TL;DR: An analogy is the flat earth. We went from thinking the earth was flat into thinking it was round, which isn't correct either since it's an oblate spheroid. But we can all agree that "round" is a lot "more correct" than flat.
[1] http://chem.tufts.edu/answersinscience/relativityofwrong.htm