Furthermore, I don't think the cars per pump argument is really valid. My usual place to refill is a smallish Morrison's petrol station on a plot remote to the store, because it's convenient for me. There are 8 pumps in total, 4 of which are 'pay at pump'. If the site was levelled and replaced with a parking arrangement similar to a supermarket car park, each with it's own charging point and payment device, I would think you could fit in 20 spaces.
Let's look at that. 8 pumps at a filling station, let's say 5 minutes to fill up, that's 96 fill-ups per hour giving each car a range of (say) 300-400 miles. Replace that with 20 charging points, let's say 15 minutes per car, that's 80 "fill-ups" per hour: that's 17% poorer throughput. Moreover, range per fill-up is going to be less (depending on which crystal ball you're looking in) so cars will have to return more frequently. That will drive demand for more capacity, not less as will result from this plan: 'nuff said.
The other thing to bear in mind is that few people can currently refill their cars with petrol at home, so the demand for charging points should, in theory, be less with EVs - and significantly less outside of city areas. I certainly wouldn't need to use a public recharging point for daily use, it's very rare indeed that I travel further than the range covered by the newest generation of EVs... in fact a first generation Leaf would probably be fine for 90+% of my motoring miles.
My point is not about those people fortunate enough to have off-road parking and able to install their own charging points. I'm referring to the (roughly) 1/3 of the motoring population who live in urban areas, in terraced houses, flats, or other accommodation without dedicated parking. If these folks are to be converted to EVs, they need access to convenient charging facilities and there is simply no plan for that at present.
Like you, I could probably get by with a Leaf, but I couldn't contemplate one because I have nowhere to charge it, plus I really don't like the idea of it not necessarily being "ready to go" when I need it without first having queued at a charge point for X hours. That's a bit of a bummer when the school's just closed because of the weather, or elderly parent has just been admitted to hospital, or any other scenario in which Joe Public currently has instant transport but may not in future.