High ceilings are a waste of vertical space. Instead of building, say, a 60′ house with two 30′ foot high floors, make that 60′ house have three 20′ high floors (numbers obviously just placeholders; the idea is what matters).
With area at a premium due to humankind’s ever increasing population and expansion (even for their dead!) on this finitely sized planet, we have to make the most of vertical space (like those 1,000 story high space-scrapers you see in sci-fi movies). Don’t waste space with high ceilings which have little use anyway, other than to provide space for impossible to reach cobwebs and making difficult and expensive to heat rooms (especially with electric heaters).