Well, I think there are more factors to earlier dying night shift workers than just their sleep cycle. To name a few:
- less sunlight (vitamin D)
- lower payment
- lower education
Those might all affect the life expectancy and if night shift workers die earlier than those with rotating shifts, it is obviously a sign that not the change is the main factor for the lower life expectancy.
From my own experience I can tell you, that I neither forgot what feeling like shit feels nor was I forced to change my sleep cycles by some exterior factors. I agree to some extend with your examples, but I don't think those are the only options to acclimate to different sleep schedules.
- less sunlight (vitamin D)
- lower payment
- lower education
Those might all affect the life expectancy and if night shift workers die earlier than those with rotating shifts, it is obviously a sign that not the change is the main factor for the lower life expectancy.
From my own experience I can tell you, that I neither forgot what feeling like shit feels nor was I forced to change my sleep cycles by some exterior factors. I agree to some extend with your examples, but I don't think those are the only options to acclimate to different sleep schedules.