In my experience real experts are always good and teaching and synthesizing/summarizing and adapting to their audience. Another matter is if an expert is appro

In my experience real experts are always good and teaching and synthesizing/summarizing and adapting to their audience. Another matter is if an expert is approached by someone who does not put in even a bit of effort (looking for a mentor but rude, or did not do any prior research on their own). Maybe it is too much of a tautology, but I would not consider someone that cannot communicate clearly an expert. The practitioner will need to put in the effort too, of course.