I would assume that if a demon lord wanted to build a symmetrical temple, he damn well will have one... :wacko:
But that's just it, symmetry is a sign of beauty, so a demon lord would never want to build a symmetrical temple. Unless of course the temple was built by angels as a trap for the demon lord, which would obviously fail as the demon lord would never feel at home at a symmetrical temple. Or, perhaps the demon lord built not a temple but a prison for another demon, who would deteriorate at the sheer thought of being imprisoned in a symmetrical place.
But I digress... Hey look, a kiwi.