That city is famous for attracting a bunch of people who love hiking and climbing mountains. It isn't a good example here, it is just full of young people who love to exercise, of course they are healthier! Just having an average age of 28.5 years have a dramatic impact on sleep statistics!
There are many other numbers in the articles that are strange, like here they compare average employed people to 13% of unemployed people, that could be true for a single population so it doesn't tell us anything!
> in a 2020 study, 13% of newly unemployed people said they got four hours of sleep or less a night, half of what the average employed person gets