Replacing a gas car with an electric car would only be worse than running your current gas car into the ground, if you were buying a brand new EV and were junking your old gas car. A lot of people won’t do that. If you buy a used EV and sell/trade-in the gas car to someone else to use, a new EV isn’t built and someone who can’t afford EV can get your used car.

Obviously pedestrian infrastructure and public transit is preferable if viable, but it isn’t always viable for the average person (at least in the USA/Canada) to switch to those, so having both options is best