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Re:Life as a public school teacher in the San Francisco Bay ... by giantg2 on Saturday June 19, 2021 @09:30PM (#27566212)
Because knowing something and conveying that knowledge are different things. Do you want a tech lead that knows everything but doesn't work to develop the people under them, or do you want someone who acts as a force multiplier by mentoring others and transferring that knowledge?
Re:Life as a public school teacher in the San Francisco Bay ... by ericd on Sunday June 20, 2021 @12:59AM (#27567213)
Right, being a subject matter expert is necessary but not sufficient to be a very good teacher of the subject.
Re:Life as a public school teacher in the San Francisco Bay ... by beckingz on Saturday June 19, 2021 @09:47PM (#27566316)
Aristotle would disagree.

You're mostly correct though, that they are separate things. For teaching technical topics well, both are needed.