Just to offer a different answer, I've had a full-time job and decent career for the past 20+ years. Before that, I had a smattering of careers in different areas which all ended when I went through a debilitating depression. I had a similar breakdown at my current career but fortunately was able to retain my job. Once I realized a decade+ ago that I had DID and that the confusion and depressions were due to the original abuse and triggers, things haven't really gotten that confusing or dark again.
I ascribe my ability to maintain a decent work life to the fact that both parents had DID but were able to function fairly normally part of the time. It was from the parenting of the non-abusive, supportive alters that I learned how to function well enough in life.
Also, education was a focus in my family and luckily the abuse and the DID mostly hasn't prevented my/our learning things. My sisters are also damaged in their own way but they've each had careers as well. Still, there are some areas of my life aside from work that are damaged or broken.