Another point no one has mentioned...banking summer interns almost never do anything critical. If he needed to work 70+ hours straight, he probably was really slow at whatever shit work he was doing. (Young bankers reading this, learn all the Excel shortcuts!)
Good bankers know how to manage expectations. Who knows what this kid was working on, but it's easy to ask the graphics department for presentation help, the India team to pull some data, other bankers for help with numbers, etc. There's literally nothing he could have been doing that someone else in his firm hadn't done before.
Erratic hours are part of being an investment banker, but what this kid was doing to himself sounds completely unnecessary.
Good bankers know how to manage expectations. Who knows what this kid was working on, but it's easy to ask the graphics department for presentation help, the India team to pull some data, other bankers for help with numbers, etc. There's literally nothing he could have been doing that someone else in his firm hadn't done before.
Erratic hours are part of being an investment banker, but what this kid was doing to himself sounds completely unnecessary.