the tech grindcore lifestyle is very different than the finance grindcore lifestyle.
in finance, analysts work long hours completing menial tasks to meet impossible deadlines. they are building sales decks and basic DCF models, but through this they develop taste, judgement, and most importantly, resilience (or they churn).
in tech, engineers might work long hours, but they take time to socialize, eat meals, attend talks, and learn about what their colleagues are working on. this is necessary for highly technical, creative work - more time will not make a feature/model better the same way it will make a slide deck prettier.
however, nearly every great engineer or researcher I know will become obsessive about a problem at some point and work nonstop until they solve it. they do this purely for the love of the game.
that might also be true of people in finance, but that's harder to discern since their reward function always has a monetary component.
one thing ill say is none of this is real. people work hard in san francisco but consultants, bankers, etc work much harder with better discipline. thereβs a weird cadre of dropout zoomers who say stuff like this as unconscious ragebait i think. half my friends are at burning man