I mean, when your worldview is challenged then you only have two options:

a) Concede, learn, move on

b) Stand your ground, no matter what

The former is hard, so people pick the latter. It's that simple.

Also, there's a form of comfort to be found in burying your head in the sand and pretending that simple solutions exist to complex problems. It requires less critical thinking and gives you hope that someday, somebody will say they've 'had enough' and solve problems like world hunger or poverty in one fell swoop. It's a lot more difficult to admit that, in reality, money is inherently worthless and the labor and resources that give it value are usually finite quantities.

Well, that or they just think economic problems are super easy to fix because their only source is a poorly-sourced YouTube video.