In which fields? Financial/Law firms are routinely scrutinized because they overwork their employees, just to name a few. Doctors, EMS personnel, Police, all work more than 40 hours. There may not be mandated work hours over 40, but the culture/workload creates that environment anyway.

As others have said, sleep deprivation is the norm in certain fields like healthcare. There are also jobs where you work 40 hours but the schedules are so random that they can also screw with your sleep such as retail. And a lot of top performing companies in a variety of fields expect people to always be on.

Even with an 8 hour day plus a long commute, there are at least 14-15 hours a day left for you. If you aren't finding time in there to sleep, that's on you.

Good thing that work is literally my only responsibility as an adult. /s