There has always been delusional guys and grifters making outstanding claims on this or that but they didnt have an platform to talk too. Sometimes some of them would get on TV/Radio and get some eyeballs, but upon further inspection (it could take some time) they would phase out of those platforms as the media would bring specialist too.
Internet and social media gave a platform to everybody to "tell their truth". Meanwhile traditional media lost public trust as people started to have access to different version of stories and could see different kind of biases, specially on the political stuff.
That gave "alternative media" more power as they weren't "restricted by sponsors interest" (funny thing is, most podcast are a ad nightmare nowadays). After that we had Covid and everything went to shit. It gave every fool the "but the scientists" or "the academia" is lying fallback on anything. As if the academia or science is a single body of consensus on every area all over the world, it's stupidity on roids. Hard facts and studies got conflated with all the polical stuff.
You go watch a podcast like Rogan and it's a long line of grifters talking dumb shit with no data to back it up. Their "own research" has no metodology, the host generally doesnt know or understand this and there's no pushback. For the podcast host, bringing an "alternative" guy brings more controversy and views than bringing the "boring specialist" who will give the standar acceptable knowledge.
So the average man knows he's being lied to in many things. If he has a controversial opnion in a thing that gets pushback, he'll be more sympathetic to opnions of people who is "being supressed" for their opnions in another things. This breeds distrust and the guy start to go with what he believes anyway, even if it's plain stupid.
I've honestly have been guilty on this on some stuff, it happens.