I believe this is part of the broader pattern of inequality in the US, and a sentiment that this inequality is unjustified. Some of of the anti-expert sentiment

I believe this is part of the broader pattern of inequality in the US, and a sentiment that this inequality is unjustified. Some of of the anti-expert sentiment probably reflects a believe that the expertise is unjustified or false. However, I believe that much of it isn't so much a belief that expertise is not valued at all, but that too much certainty is attached to expert versus nonexpert ideas or opinions. That is, it's not that the expertise isn't valuable, but that the fallibility of expertise is underacknowledged. Some of what's played out over the last few years in this regard is more a matter of principle or rejection of the societal and institutional structures that allow expertise to grow too much in power, or suppress individual autonomy, rather than because of disagreement with a particular expert position. If you take away competition, and encourage inflated credentials through a society that overemphasizes them, and minimize people's ability to assert choice, you're going to end up with resistance. I sincerely believe this plays out on the left as well as right in different ways.