Lots of people are great riders but not all are great teachers.
I agree, riding skills and teaching skills are not the same thing.
Years ago I took one of those WBP camps, ya all of the pros can ride but they can't teach as their bike skills come naturally. Their advice tended to be "do it the same way I do." The best teaching by far was from a rider than I'm guessing had never been in a bike video (at that time anyway).