Why do people, even (possibly) smart and well-meaning people, think there is some one size fits all lifestyle that works for everyone? Maybe some people/jobs wo

Why do people, even (possibly) smart and well-meaning people, think there is some one size fits all lifestyle that works for everyone? Maybe some people/jobs work better on different schedules. And exactly how is this experiment going to collect useful data about the impacts of a shorter workday? Details matter if this is actually science. If it is really just politics then who cares as long as it is popular with the majority.