Charging stations are not free. Only relatively early adopter Tesla owners have free charging and only at Supercharger stations, and that is a very small sliver of the market.

Electric cars are still greatly more efficient on energy usage compared to gasoline cars. You'd have to grossly overcharge for electricity to make the comparison anywhere close.

Use this calculator to see the difference in fuel vs. electric costs:

https://afdc.energy.gov/calc/