Off topic question, but what do investment bankers even do for all those hours every week?
He said most of the time was wasted. It was spent on things like preparing slide decks for executives who then didn't read them, but who insisted the work be done in massively compressed time windows and then delivered by taxi at 6am on a Sunday. He viewed it as very inefficient and mostly a matter of bad culture. The senior managers did it when they were young, so they weren't about to let the next generation get ahead without the same sacrifices.