That would make sense if one were talking about time spent on furthering one’s goals, or enjoying life’s pleasures. But in many cases I think we are talking about an hour before sleep spent “idly” browsing social networks for one more “information fix” which I suspect most would not consider worth the trade off if made to choose. A bit similar to smoking perhaps... the reduction in productive life span feels far away, and the temptation in the moment is hard to resist.