Professors do not have a degree in education or teaching.
Matter of fact, I don't know why the silly bastards are allowed to teach without a degree in education.
While the supposed job description of a professor entails teaching, in actuality most professors know absolutely nothing about teaching. However, many professors will not hesitate to take a student's tuition money, not teach him anything, and then test him on what he was never taught.
The other main activity of a professor is embezzling money (that could have been spent on useful things) for their own "research". Usually, this "research" involves topics that nobody outside of academia will ever care about or find a practical application for.
Take solace in the fact that your professors earn a miserable salary in proportion to the level of education they have attained.