The problem is that Western culture, particularly the Anglophone subset, is generally against sleep, equating the pursuit of adequate sleep--which vaies by individual--with sloth or laziness. A sleeping person is very obviously not working.
Through two acquaintance connections, I know someone who was assigned night shift work, and then was fired for falling asleep on the job in the first month. The employer made zero accomodations for the fact that he has human employees, and that he put them into a constant state of war with their own bodies to get his money. Pilots have to enlist the aid of regulators and unions to get their airlines to recognize that pilot fatigue is not the pilot's fault.
I suspect that this attitude was probably influenced by Anglo racism against Hispanics, targeting the midday siesta custom. It is somewhat telling that to get an Anglo to sleep around midday, you have to rebrand it as a "power nap", and sell it as a late-day productivity booster.
People in our society can advance to positions of greater authority by sacrificing biologically important things like sleep, leisure, and companionship and temporarily compensating with drugs like caffeine, cocaine, and prescription stimulants. Then they reach their acme, get the executive position, and resume normal work and sleep patterns while pretending to themselves that they could still work 120 hours every week. Then they reason that since they were able to achieve greatness by temporarily sacrificing a lot of sleep, everyone should be able to do a little better by sacrificing a little permanently. They don't particularly care about the science, since they have firsthand knowledge of their own meteoric rise and subsequent success.
Everyone else is stuck trying to defend against continual encroachment on the 40-hour work week, and they are forced to sacrifice sleep by necessity rather than by choice.