These conversations sometimes seem like another culture war front. Which is basically the last thing we need.
I do think there's a place for a bit of nudge theory from the authorities here. Just like with charging for carrier bags, they can make it less and less attractive to drive in...
You're right of course, but it's the up front money which in current economic times, not enough people have.
If I had £30k I would love an electric car and it would make economic sense for me to get it, but I don't have anything like that, so the fact that it's a good deal is a moot point