Those people also have their cars in multi level car parks with no sun so that doesn't work for them either. In that case they would be better having the car park have solar and the local government building solar farms. A panel on something almost always undercover makes no sense.

I live in an average residential street in Europe full of 3 story residential houses. Our house with 6 apartments has 3 garages, the majority park on the street.

Sure, the government or the electricity company could just install car chargers and put a solar plant to power that in some rural area. But if I want something now then buying a car is much simpler than lobbying for that.