I couldn't see anything in the article about early vs late risers. My impression when looking at this kind of research, is that it, like everything else around this subject in society. Is from the perspective. That early risers are the only valid type, and us late risers are anomolies, that should not be catered to, and our challenges are a moral failing.

For me living in Norway, one of the hardest things every fall, and that makes me depressed for weeks, is when one weekend, when the days are already getting shorter fast. One hour of evening day light gets janked overnight. It is imo. horrible.