Advice for "Efficient management of solar radiation" does not include using any of the solar power to generate electricity, or even heat water? That looks like a gaping hole in your analysis to me.

The advice given here, is in effect, how to milk the last drop from extracted energy, not any assistance to becoming energy rich or gaining real energy security as is possible from solar.

Even advising to "Paint houses black", in places where there is less sun is weird logic, all that would do is reduce the insulative effect of any paint, making both hot and cold weather feel more extreme.