I think there is some truth to what you say, but you would be more productive if you approached the "problem" from a place of empathy, like the article discusses.

A lot changes after high school/college which frankly makes learning more difficult.The nature of brain development changes, people acquire new priorities like jobs, children, and family. Additionally, they have more cognitive inertia to work against.

If you are implying that harsh attacks are required to snap them out of a deep set belief, and I don't agree and have never seen it work in the real world.