That's why so many professionals are so adamant about sharing their theories on nutrition.
It's just the unfortunate reality that there are also countless special interest groups with particular motives when it comes to spreading disinformation.
(I do share links to studies I find interesting, but I don't really believe I can evaluate them and know which ones will hold up.)
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. :)
If you're feeling confident about something without having done your due diligence, that's a separate issue.