The thread is not directly about me, although there surely are certain similarities. It is inspired by several discussions I had with friends over the last couple of weeks - it seems that the lockdown had triggered an early onset of the dreaded midlife crisis in many of us. 
So I will call the abstract heroine Mary.
Mary has a steady, secure and well-paid job - let's say, she's an accountant. She is also a parent to a couple of small children, and let's make it even more difficult - a lone parent, so there's no help or a safety net from a partner.
Mary is quite unhappy in her job, and has been for some time. She has always dreamt of doing something very different - let's say, veterinary medicine. Going back to uni to re-train means that Mary's family will have to live a very basic lifestyle for a couple of years, and then some, until Mary catches up in her earning power.
So the question.
Does Mary owe it to her children to stay in a mind-numbingly boring, but safe job? Or does she owe it to herself to try something she really wants?