I'm reminded of the old saying:
Those who can't do, teach.
Those who can't teach, teach Gym.
"Those who can't teach, teach Gym."
And take the football team to the playoffs every year in a state that has produced Hines Ward, Richard Seymour, Robert Edwards, Champ Bailey, Matt Stinchcombe, and several other NFL players I can't remember at this early hour.
See post #13.
The version I heard is "those who can't do, teach, and those who can neither do nor teach go into politics."