Lot of reasons, but the main ones are that the components and material for electric vehicles do more damage to the environment than gas vehicles.
Another good reason is a lot of houses burn down during flooding from hurricanes and tropical storms in Florida, caused by electric vehicles going partially under water.
The technology is not ready to replace gas vehicles. I am not against the research and development, but they are not ready to replace gas vehicles at this time.
The grid is not up to it either.