While I have sympathy for those with genuine SAD syndrome I do think we should be used by now to the fact that the length of days and light varies with the seasons .
It’s not the Land of the midnight Sun in summer or weeks and weeks of perpetual darkness like eg parts of the Baltic where Scandinavia’s winter days are characterized by a significant reduction in daylight hours, with the length of the day varying by latitude.
In the far north, the "polar night" occurs when the sun does not rise above the horizon for weeks , though some diffused light may still be present. In the more southern areas, there may still be a few hours of daylight, but the sun rises late and sets early.
So why do we make such a fuss about it?