Inherence and Acquisition
The map is not the territory, and enlightenment is not the click.
In the United States, we often talk about "anti-science" groups, including diverse sects of Christianity and the Republican Party.
Personally, I think of the Seventh-Day Adventists. Anti-Catholic, quasi-nationalistic, and a community known both for the number of progeny trained up to medical professions
and an unhealthy skepticism toward modern medicine.
And we can say what we will about diversity in the community; that's not the point. Neither, technically, are SDAs themselves.
The point is that a bunch of this stuff has been passing unchecked from generation to generation. SDA isn't exactly a huge sect, but throw in LDS, SBC, and the megachurch phenomenon growing over the course of recent decades, as well as massive television and radio networks devoted to disseminating misinformation―again, generally unchecked―and suddenly I don't find it surprising we are in a time of antivax and flat-earth.
Anti-institutionalism, as some have mentioned, is a consideration; anti-institutionalism is, however, as anti-institutionalism does. As with, say, antisocial behavior, the fascinating and vital aspect is the particular manifestation.
To crave empowerment is inherent; the manners and paths by which we pursue it are acquired.
Flat-earth, as I see it, is to rebellion as Boaty McBoatface is to science. That is to say, it's a desperate, pathetic joke whose adherents aren't smart enough to figure out.