If you want to understand why we have stupid people disbelieving the efficacy of vaccines look at this thread of a smart person using his intelligence to cloak lies with as much scientific credibility as possible. The result isn't belief in lies, it's loss of trust in science.https://twitter.com/ewanbirney/status/1188590628885684224 …
If the heuristic used by the population is to trust experts, they'd get a lot of very big, important things wrong so they've abandoned it - and there's no good replacement - "believe everything @gcochran99 says on scientific matters" unfortunately isn't widely considered.