GB Shaw’s repeated quote written in 1905 is “those who can, do; those who can’t, teach." Back then, of course, most teachers were…wait for it…women. If you taught at a university or college, you weren’t a teacher, you were a professor. To say that there was a fair bit of inherent misogyny in the statement is probably an understatement.
A better riposte attributed to Aristotle is: “Those who know, do. Those who understand, teach.”
Pete