And, importantly, the potential outcomes of middle-east tensions leading to oil prices going up is something people are used to. It seems likely that something like solar panels would be less prone to disruption from overseas crises. OTOH, maybe tension in the South China sea means that it's impossible to get replacement solar panels. It's trading a set of drawbacks that people know how to deal with, for some that maybe they don't. Change is scary.

I'd love to have a home I could mount solar panels on. For me, the potential drawbacks are tiny compared to the potential benefits. But, not everyone feels the same way, and it isn't just because they can't see the obvious.