I see your point. But many people have only one automobile which has to be reliable. City people tend to take public transport, subway, taxi, or bus.
Cold weather is very hard on batteries and reduces their efficiency. Too many accidental fires, Resale value of the vehicle when the battery gives out is nil. Recycling costs for the battery will be charged back to the car owner
well, let me give my example - I have an older, second hand tesla that I got last year and used it sparingly during winter (as I live up a hill and with snow it can be dicey without snow tires).
However, when I did take it out around 5 to 15 fahrenheit, I noticed a drop in efficiency of around 25%. My gas car’s efficiency dropped by around 10 to 15%.
you are correct that there are a lot of things to improve