I do not know which career you are thinking of and in what country you live, but working 24/7 sounds like too much, does that mean no personal life? Does that allow for enough rest to feel well and grow older healthily? I don't have any competence to give advice, I just know that personally I want my work to be something I enjoy, especially if it represents over a third or even a half of my awake time.
also, I don't think you should be concerned that such a read is provoking questions, thoughts happen all the time, while reading stuff, talking to people, listening to stuff, walking the streets, and so on
If this One Shot made me weirdly rethink my return to university? The idea of going into a career where you're expected to basically work 24/7 and have no life... After studying 24/7 and having no life....
Day-to-day living already is exhausting for me (っ°Д °;)