If it really is so simple, why when I live in London do I not see entire streets filled with chargers? Surely you'd think that'd be in place by now given the time frames?
I think it's hand-wavey to say 'oh you can just charge at low current'. And if you've ever seen a petrol station near a motorway here you'll realise the idea of parking your car for x * 10 mins to charge would simply not work, there'd be multiple mile tailbacks.
Overall the govt treats this issue like it's a smaller problem than it really is.