From what I saw for 17 years at the college (I didn’t teach, I was the Director of the Corporate Training Center), the biggest problems with teaching are that there’s lots and lots and lots of politics and the teachers have to start over again and reinvent the wheel all over again over and over and over again every semester or every year (depending on their field) with a whole new group of students. Same work, same problems, same deal every semester, sort of like reliving your life over and over again in a never ending story, like a film stuck in an endless loop. Even though I could have gotten summers off if I had taught (I worked all year around), I could not have taught.
I know teachers who love what they do and work very, very hard at it. I know others who do it just for its benefits (yup, summers off, tenure, being in charge of the class when they’re in session, and they can BS their lives away), and I know others that spend their entire careers “blowing hot air”. The latter never ever make any attempt to keep up with their field and never learned another thing once they got their grad degree. They’re mostly liberal arts profs.
I know teachers with PhDs and MDs that never stop doing research, never stop studying, never stop learning, never stop growing. Typically they’re in the fields of physics and medicine. A few are renowned in their fields and affiliated with (in two cases) Los Alamos and (in one case) CERN. For these people, teaching allows them to keep growing in a way that a regular 9-5 office job would not.
There are an endless range of reasons why teachers teach. Personally, I could never stand being in that endless loop, and I was too invested in my family to be focused on constantly advancing myself.
Yeah, they get summers off if they choose. And teaching can be an easy ride through life, typically for those that chose the easy fields of study in college (is there a trend there?). But IMHO good dedicated teachers deserve every penny they get. I couldn’t do it. Although it would have been nice to have summers off.
Teaching can be a good racket, a lot of work, or an opportunity to grow endlessly like no other job. It’s all up to the individual.