Yes, I think that, while some people have serious health issues, much of this is just fad.
[Update a while later]
I should note that I’m allergic to tree nuts, but it’s never been life threatening, as far as I know. It’s just that if I eat them, the linings of my mouth and throat itch.
One more point. I’m not normally into censorship, but I think that the “Food Babe” moron should be banned from the Internet.