I love this because my brother teaches, college level. When I told him my son wanted to follow in his footsteps, my brother said, No he doesn't. If he were a poet, he'd have written your poem. He's an engineer - still trying to engineer an argument to convince my son it's not a career path to take.
Similarly a pal of mine was an adjunct for years. Her complaints echo yours in the poem. She now sells real estate and makes a pile.