Like everything else in this country, people seem to have this pathological need to take things to extremes.
I don't think it's about "going to extremes" per se, but people have the expectation and demand for a single solution and a single "right answer". They're looking for a "correct belief system" that can't be challenged and will never require revision. They're looking for "the correct thing to study in school" to the exclusion of all other topics, which should guarantee you a good, easy job that makes you rich. They're expecting there to be a "correct place to invest your money" which will return large profits every year with no risk whatsoever. They want a "correct diet" where they can eat some specific combination of foods that will make them always healthy and in-shape.
And those things don't really exist. They can't exist. But a bunch of people get convinced that they've the "correct" belief system, they run around trying to get rid of all of the other ones. Someone tells us the "correct" field to study is law, and then we end up with a glut of lawyers. We hear on the news that the "correct" place to invest your money is home ownership, and we get a housing boom followed by economic collapse.
"Going to extremes" is the result. "Wanting easy answers" is the problem.