'you go to school to learn'

so, the other day in my writing class, we looked at this poem.
stab my brains out because i like it too much!

"you go to school to learn to
read and add, to someday
make some money. It - money - makes
sense: you need
a better tractor, an addition
to the gameroom, you prefer
to buy your beancurd by the barrel.
There's no other way to get the goods
you need. Besides, it keeps people busy
working -- for it.
It's sensible and, therefore, you go
to school to learn (and the teacher,
having learned, gets paid to teach you) how
to get it. Fine. But:
you're taught away from poetry
or, say, dancing(That's nice, dear
but there's no dough in it). No poem
ever bought a hamburger, or not too many. It's true,
and so, every morning --it's still dark!--
you see them, the children, like angels
being marched off to execution,
or banks. Their bodies luminous
in headlights. Going to school."

now, here's the question... i feel this way. but why can't i ever write like this. i just can't anymore. period.