A post at The Professor is In talks about the fact that it is reasonable to leave academia if you want to. Even more than that, however, the discussion (for me anyway) is about why it is still fine/reasonable/acceptable/ethical to teach graduate students.
What I do not endorse is telling anyone to give up their dreams just because their dreams are difficult/close to impossible to accomplish. Would blind people ever climb Everest if they accepted that?
Achieving financial, emotional AND intellectual well being in academia is somewhat akin to climbing Everest blind. It is damned hard.
Wise counsel in terms of things to think about concerning the dream are also provided. It’s OK to Quit is worth reading.