[bunderbunder]

Alternatively, permanent winter time would mean that school hours are entirely during daylight if we shift the school hours to match.

Alternatively, some time zones are so wide that there's no argument that assumes a constant school or work start time and can also work with a standard time system. For example, not far east of where I live, it's possible to switch your clock from 8AM to 7AM just by driving to the next town over.

All of this by way of saying, presenting these sorts of observations as if they were compelling is specious. With the sole exception of the rate at which the planet is spinning, literally every variable is easy to vary.