The critical thinking thing is huge.
100 experts who’s entire career has been spent on a particular topic and who have no political agenda have a consensus but one random guy with shouty YouTube videos selling obscure crap or health **** that tells you the opposite and you believe him. So this means one of two things:
1. The recognized experts are all wrong and random guy with zero qualifications has somehow figured out something science has missed.
2. You’re a deluded, gullible fool.
Questioning science is absolutely fine and how we change theories to fact through experiment and constant checking. What’s not fine is questioning science in a disingenuous manner where in the face of overwhelming evidence a person still clings to the “well, I still just don’t believe it sorry” and carries on sowing seeds of doubt where they can.
My own feelings are that the current state of social media allows nefarious people to undermine collective efforts to improve things and also allows some people to have a sense of power that they didn’t have before by attempting to influence events and actions in a contrary way. They get their 15 mins of fame by being the figurehead in some ****** Twitter thread about how vaccines make your wang drop off.