Major demographic collapse is already happening around the world, it’s just that it happens in very, very slow motion. You can see examples of just how slow-motion by looking at Japan and South Korea, or China with the ripple effects of the one-child policy only now starting to be observed en masse. Same with many countries in Europe, like Italy and Greece. The US would be experiencing it in slow motion right now, but we make up for the difference through immigration.
The argument is that all you’re doing is moving the carbon emissions from the car directly in your vicinity to the coal-fired power plant a long distance away. Move that same coal-fired power plant into the sealed room, and suddenly it’s no longer far away, and the “unclean” nature of the electric car, so the thought process goes, becomes obvious.