I fail to find a single educationally or societally valid reason to send kids to school exhausted. Some Maryland school districts examined the hours that schools are in session, especially opening times. That's early for anyone. Emotions always run high when changes to school calendars are proposed. Students, parents, teachers, and taxpayers all have their own concerns and are affected in different ways.
Some students fear loss of time for jobs, sports, and other extracurricular activities.
Other students revel in additional school time or a more flexible approach to the time spent there. Parents fear disruption of family time and family traditions. Teachers are concerned about additional hours or days and disruption that might be caused to their own families and educational opportunities. Teachers are also aware that change requires time to learn new methods and plan in new ways. Taxpayers are concerned with the costs of extended days and years.