Because the "next" meme is the antithesis of what HN strives to be.

For example, fasting might help fight cancer, so there's obviously more nuance than just "eating fights cancer, next!".

I still think the point of the “next” comment is that we didn’t really learn anything — except that there’s more to learn. To your point, way too much nuance here, and it sounds like the title — and maybe article — is clickbait.

The comment appears at odds with several items in HN guidelines, like

- Be kind. Don't be snarky. Converse curiously; don't cross-examine. Edit out swipes.

- Comments should get more thoughtful and substantive, not less, as a topic gets more divisive.

- Please don't sneer, including at the rest of the community.

- Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something.

Because this identified a specific nutrient, and a specific pathway for its action. The "eating food improves immune response" is an absurd characterization.