Many would simply say "I'll do it for 4-5 years and then make some other junior analyst do it for me when I'm a manager".

It's a pump-dump mentality internally you know...

I'm sure they would disagree with me but to be fair, will you make good decisions if you don't sleep enough and work 16 hours a day? I'm thinking sure, if this goes on for a short period of time but most people will eventually burn out.

Many can, of course, handle such working conditions but it can hardly be considered healthy in the long run.