I don't think take a nutritional expert to assert that too much fat and sugar and not enough exercise is a health issue. Or that it takes an expert to recommend a primarily vegetable-based diet.

I do think it takes a certain level of expertise to start making claims about things like Keto without just repeating something you heard elsewhere, but a diet with lots of vegetables is undeniably healthy.

Don't be afraid to share the knowledge you feel confident in. Just hold back on the stuff in which you aren't confident. :)

I don't think I know anyone who hasn't heard this conventional wisdom many times before. Repeating common beliefs without adding any value (such additional evidence) is an example of what I would consider noise.

You shouldn't feel confident in something just because it's a common belief. You should feel confidant in something because you've researched it well.

If you're feeling confident about something without having done your due diligence, that's a separate issue.