It's a bit of a joke. e. e.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Nona The BritIt's a bit of a joke. there is a famous proverb (or could be a quotation, not sure) that says
'Those who can, do; those who can't, teach.'
It means people who are good at something actually do it professionally (i.e. artists) those who are not that good at it teach others (i.e. teachers at art college).
'Those who can, do; those who can't, teach.'