[muzani]

Not quite true. I love what I do, but what I do is really hard work. It is such excruciatingly hard work thay it slowly rips out my sanity.

I can imagine this is the same for academics.

Plus a lot of the job are things that they hate doing - politics, fundraising, dealing with hopeless students, writing modules that never get used. Many of them spend all their time doing these things, and the "overtime" is necessary to get the real work done after all that.