> The quality of instructors is truly amazing - easily the top 0.1% - most are world-famous masters of their art. Things like acting lessons from AAA celebrities, dancing lessons from the lead ballerina at one of the top companies in the world, music lessons from multi-platinum artists etc.
FWIW, the best talent usually do not make the best teachers. This is a fact widely remarked upon in the world of sports. Knowing how to get your body to do something well is a very different skill from being able to get another person's body to do something well.
Also, understanding the various ways in which people learn a specific subject is an underappreciated ability possessed by a good teacher. Knowing how various people get hung up on conceptually on different elements of a subject is something that comes from experience and outside review of your teaching that a "master" probably never gets.
The corollary is that good teachers are rarely great in their field.
FWIW, the best talent usually do not make the best teachers. This is a fact widely remarked upon in the world of sports. Knowing how to get your body to do something well is a very different skill from being able to get another person's body to do something well.