I have lived all my life working in universities, except for two years in a national laboratory which was pretty similar to a university physics department except that there was no teaching involved. It has been a good life for me.
But a recent study of graduate students in the life sciences, physics, and chemistry finds that they find academic life less and less attractive as they progress further along towards completing of their degree, although their thesis advisors encourage them to seek academic jobs.
On an anecdotal level, I can see why. Faculty in the sciences are under a lot of pressure to bring in grants at a time when government funding is either flat or declining. This is the result of a model of doing research in the sciences that developed in the post-Sputnik era when the government was pouring money into science and it was not too difficult to get an academic job and research funding. But funding is being cut back on a major scale and young scientists now face much greater challenges.
I see young faculty working extraordinarily hard and for long hours, driven by the need to get results and money and papers at a pace that they cannot, and should not, maintain if they want to lead healthy, balanced lives. I can well imagine that graduate students view that life and find it wanting. This is not a healthy state.