This is wrong, because you’re talking about disability insurance in a comment thread about disability discrimination.
Disability is very broadly defined for the purpose of disability discrimination laws, which is the context of this comment chain.
Disability is defined specific to a person’s work skills for the purpose of long term disability insurance (like the US’s federally administered Social Security disability insurance). Depending on the program/insurance type, it might require that you can’t hold down any meaningful job, caused by a medical condition that lasts longer than a year.
For things like short term disability, the disability is defined specific to that person’s preexisting job. Someone who gets an Achilles surgery that prevents them from operating the pedals of a motor vehicle for a few weeks would be “disabled” for the purpose of short term disability insurance if they’re a truck driver, and might not even be disabled if their day job is something like being a telemarketer who sits at a desk for their job.
On the other extreme, 24/7 operations have redundancy.
A friend of mine explained that being an Emergency Medicine physician is a great job for work life balance, despite the fact that he often has to work ridiculous shifts, because he never has to take any work home with him. An Emergency Room is a 24/7 operation, so whenever he’s at home, some other doctor is responsible for whatever happens. So he gets to relax and never think about work when he’s not at work and not on call.