> Are residents and people working on ships actually making decisions for 100 hours a week?

Residencies? Yeah. The guy who came up with the US' system for medical residency was high on cocaine pretty much constantly and expected everyone to perform at his level.

https://www.wolterskluwer.com/en/expert-insights/a-day-in-th...

https://en.wikipedia.org/wiki/William_Stewart_Halsted