I was out sick 5 days last month and it's only Feb. People get sick and need time off for various reasons.
I have accumulated 180 days of sickleave. I do however wind up using my 3 personal days almost every year.
You are right. I also wonder how many of those days are related to pregnancy issues. The fact that teaching is more female-oriented has to be some factor, though I'm not quite sure what it is.