Teaching is a tough job...and to those that chide me for the short hours and for all the time off I get, I can usually simply ask if they would like to do my job. This usually settles the point. That, or, I mention my paycheck.
That said, I love my job and am not convinced that I am capable of doing much else besides running barcodes over a scanner. But, man, do I love these breaks. And I am firmly convinced that teachers, students, politicians, doctors, and others with high-stress jobs need these breaks badly.
Otherwise, we would just burn out and fade away.