Yeah, like calculate the square root of -1!
That's the joke.
That teaching degrees are bullshit is fully demonstrated by the hundreds of thousands of college professors who've never taken a day of courses meant to create teachers.
To be fair, this lack of training for college professors often shows. And I also think you too easily dismiss the time spent by many graduate students being teaching assistants.
As it is, teachers are paid far less than other professionals with a similar level of education and similar amount of work.
Are you sure about this? Last I checked it seemed like half of the low end service jobs these days are filled by college educated people/.
It is much harder to find a job than to keep one.