I interpreted the point more as in: if you're not talking to "fellow experts", it's more productive to explain things in plain language, even when that implies simplifying a lot of "unimportant" things.

Simplifying a difficult problem without losing track of the important points is hard, maybe even harder than going into all the little details that make up the problem, and people who can do it effectively usually have a lot of knowledge in that field. And some skill at "talking down" :-)

Anyway, it's good to see you here again :-)