It's one of the attitudes being pushed in the education system itself. After a couple of generations, "expertism" has embedded deeply into the American mindset. It's very dangerous to live in a culture where we don't question experts.
This is true, but like so many things America seems to have lost the ability to moderate. For every person who blindly follows "experts", there's someone who insists experts don't know anything at all and any random thought that pops into my head is just as valid as any expert opinion.
It's gone binary, and the actual real world is analog, as any expert will tell you.
I wish you were wrong. I've met actual Flat Earth believers, which I find astonishing and disconcerting. Unfortunately, I feel like the over-reaction against expert opinion is part of the cost of prior abuse of expert opinion. Trust in institutions is eroded and in my opinion, for justifiable reasons. We're definitely not in good shape as a society.