That’s overly simplistic.

A lot of the social media content itself claims “decades of research, thousands of studies, yadda yadda”.

At some level - unless you’re taking deep educated dives into the peer reviewed analysis of a highly technical field - you are relying on someone else for information.

That is, after all, why we go to professionals for advice to begin with. Doctors, lawyers, professional engineers - each of whom have their own (often imperfect) understanding of the field. Some who may even be outright cranks exploiting their credentials for personal gain. Some who may even have elevated platforms (Dr. Oz for instance) to sprew the misinformation far and wide.