Exactly. As a point in favor of this worldview, I'll use my mother. She completed her economics and English degree in India (undergrad). She also completed her liberal studies undergrad and a graduate teaching credential again in the United States (they would not accept her foreign undergrad, so she had to repeat). She said that the teaching education was mostly a joke and her classmates absolute dunces. This was at a public university -- cal state fullerton, to be specific.

Ultimately, teaching education, even graduate education, is not difficult and mostly a joke, which is what is reflected in their salaries.