Besides the fact that your friends back home still hanging around the Quickie Mart guzzling slurpies will shun you once they hear tell of your nefarious activities in the underworld of education, you'll have to endure a myriad of disappointments and other general unpleasantness. Take the workload, for example. You'll spend about half the time of normal working stiffs actually doing your job, and in the winter and summer the students magically disappear, leaving you alone to listen to the echo of your own voice bouncing off those empty classroom walls. All that free time is hard time, pure and simple. It's just like being incarcerated.
Nobody wants to go to prison because the penal concept of penance is based on free time.
Of course not. Then again, just like detention, all that free time counting your fingers and toes gives you a good chance to think about the numerous mistakes you've made in your life like becoming a teacher in the first place. And when you really give it some serious thought, teaching is one thankless job that nobody has to do anymore anyway. With the advent of the Internet there's really no good reason to learn. It's a great site.