THIS. This is very real. It's the "Curse of knowledge" (I had forgotten the name, but just looked it up in a list of cognitive biases). I run into it all the time. Basically "better-informed people find it extremely difficult to think about problems from the perspective of lesser-informed people."

It can be easily (but temporarily) cured, by trying to get real people, in person to try to understand something that you think is simple.