You may also want to look at the time *good* teachers spend in the summer getting their masters (at their own expense), going to workshops and certification classes, and preparing lessons/classrooms/etc. for the school year.
Also, in my school district teachers do not get ANY money for classroom supplies. They spend their own. My SIL and one of my good friends are teachers, they spend several hundred dollars a semester getting supplies for the classroom. Professional athletes are given state of the art facilities to work out in, trainers to help in the off season, heck, even free shoes and equipment if they have endorsement deals.
I agree very few people have the talent to be professional athletes. I also think very few people have the talent and dedication to be professional educators. I believe we would attract them to the profession if the salary was more in line with what they do. I'm sure there are many consultants, salespeople, corporate trainers, etc. who would make fantastic teachers but cannot afford to take a cut in pay to do so. If the salaries were better we might be able to attract to attract "the better players," so to speak.