Hasbeen,
Firstly, rest assured the government will not be forcing you into an electric car.
Secondly, the main advantage of electric vehicles is less air pollution.
Thirdly, if CO2 produced is the same over the lifetime of an electric car and a similar sized petrol car, it's probably because the EV has a longer lifetime!
Fourthly, I'm glad you at least recognise the warming effect of water vapour. But what would it take to convince you that the warming from CO2 and other greenhouse gases increases the amount of water vapour in the atmosphere?

David, The problem with hydrogen is that the energy loss in the cycle
of using the original energy and converting it to turning wheels.
There is still a problem with fuel cell life time.
My son's inlaw was the GM of of a Bus manufacturing company and they
put a lot of effort into hydrogen/fuel cell buses but they just were
not economic. They are still trying but there are fundamental problems.
They were also working with Mercedes buses and there are some of those
being trialed.
Oh yes, the fire regulations required that they rebuild the roof of
their factory.