Is anyone really "too stressed" to work?

One of my best friends recently wanted to quit her job due to an overwhelming amount of stress. She had no savings and bills (rent, food, gas etc.) piling up. I talked to her and asked her what was so stressful. Every stressful thing she mentioned sounded like the normal part of 9 to 5 job. I urged her not to quit but if she does I dont know if we can stay friends.
Is anyone really "too stressed" to work?
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