Stoic advice on work?

Hello, all. Looking for stoic advice on work. Long story short, I’m an anesthesiology resident, as such I don’t set my hours, which average anywhere from 50-80 hours/week. I like the actual practice of anesthesia, but the hours are long and can be very depressing at times. Some days I find meaning, but others I struggle to find any meaning (e.g. if I’m in a case for placement of a penile prosthesis, or a 96 year old with no quality of life getting a procedure to live an extra week).

Lately I just find work and the pursuit of money to be pointless. I would much rather be a self-sufficient farmer than go to a hospital that doesn’t value me and I don’t always find value in. However, I’m in year 11 of 12 of training since finishing high school and it seems silly to quit at this point.

TLDR: how does a stoic perspective help find meaning in a modern job