Thank you all for the helpful replies!
And I'm sorry this thread has caused some heated disagreements. I don't believe anyone was intentionally being toxic.
However, there seems to be an implicit assumption in medicine (not directed at any poster in particular) that specialties that are "interesting" or "one's passion" are different from those specialties which "promote work-life balance" or "allow for regular sleep." The result of this assumption is that we view prioritizing career satisfaction and wellness as an either-or choice. Taking this reasoning further, I would need to "settle" for a 2nd or lower choice specialty to prioritize sleep. Perhaps it is because I am early in my training, but I do not understand why it has to be that way. I don't even know what my 1st choice specialty is. (I used to think it was neurosurgery, one with admittedly poor sleep schedules, but after several months of medical school, I realize how many amazing alternatives there are.) I'm considering several different specialties which all seem interesting to me. (neurosurgery, neurology, psychiatry, allergy/immunology, infectious diseases, cardiology, pulmonology, gastroenterology/hepatology, ophthalmology, pathology, pediatrics) Some of them may allow me to get a good night's sleep, and others may not. And if I ending up liking a specialty much more than the others, and that specialty does not have a good sleep schedule, I might choose it anyway. But why is it so likely that the one I will end up liking is going to be one which does not allow a regular sleep schedule? The two seem pretty independent to me. If there's something I'm missing here, please don't hesitate to let me know.