To add to the weight problem, in my country (NL), road tax is calculated based on the weight of the car, not the amount of kilometers driven, although VAT and excise on fuel do compensate for that. That said, road tax is included in fuel costs over in Germany.

That said, the long-term theory of EVs is sound; if they have the right sensors and if they're interconnected with each other, more accidents will become preventable and the net result is a safer environment. But that's the theoretical outcome.