Perhaps a clearer example may be found in sports coaches.
The main reason that coaches are important (not just in sports) is because of blind spots—i.e., things that are outside of a person’s direct perceptual awareness.
Think of the Dunning-Kreuger effect: if you can’t perceive it, you can’t improve it.
(This is also why publications have editors; if a writer could perceive the errors in their work, they could fix them themselves.)
The main reason that coaches are important (not just in sports) is because of blind spots—i.e., things that are outside of a person’s direct perceptual awareness.
Think of the Dunning-Kreuger effect: if you can’t perceive it, you can’t improve it.
(This is also why publications have editors; if a writer could perceive the errors in their work, they could fix them themselves.)