Those who can’t do

Those who can’t do, teach.
And when their students graduate, they can’t do, either.
So they also teach.
Pretty soon, all of those who can do, retire. Or they die off.
Then, all you’re left with are teachers and students.
Nobody actually doing.
Just teaching, or learning so they can teach.
Every now and then, there’s someone who can do more than just teach.
But they end up becoming a critic.
But it’s okay. We don’t need anybody to do anymore.
We have robots to do it for us.
Until… robot manufacturers and repairmen becomes the “Those who can’t do.”