What happened right around 2016 was a combination of the internet being weaponized in the political space and the destruction of of revenue for legacy media because of Facebook and Google and other walled systems which ingested their IP and served it to their users. This effectively made people paranoid of data that didn't immediately fit into their world view because the concept of any shared truth was shattered and at the same time it felt like everything and everyone on the internet was targeted to misinform you.
The 'mainstream media' was never taken seriously by people savvy in the early tech spaces, so the loss of it didn't really hit us as particularly impactful. But that loss made it so that the 'mainstream' no longer had any 'ground truth' they could all fall back on that would be the arbiter of correct and incorrect information, and so truth became whatever felt most right to a person at the time.
This of course has more to do with the people and culture you most identify with, rather than any kind of objective comparison of data, so groups looked more inwards and became ossified in dogma and refused to look at any other perspective in good faith. And here we are.
The 'mainstream media' was never taken seriously by people savvy in the early tech spaces, so the loss of it didn't really hit us as particularly impactful. But that loss made it so that the 'mainstream' no longer had any 'ground truth' they could all fall back on that would be the arbiter of correct and incorrect information, and so truth became whatever felt most right to a person at the time.
This of course has more to do with the people and culture you most identify with, rather than any kind of objective comparison of data, so groups looked more inwards and became ossified in dogma and refused to look at any other perspective in good faith. And here we are.