Dave Plowman (News) presented the following explanation :
Someone had to pay for petrol stations too.

They were a gradual development, over 120 years and ICE became more
widespread and greater distances were covered. For electric vehicles we
expect and need high capacity charging to be available now.

It would not be such a problem if the charging were instant, like
fillingup with diesel, but imagine a garage choked up with cars sat
there for many hours, recharging, whilst a long queue builds up outside
all waiting to recharge.