. We can’t immediately convert all cars to EV, we don’t have the grid capacity or enough charging stations, yet.

Well sure, but there’s no suggestion of converting “all cars” to EVs “immediately”. Even if ICE cars were banned for new sales tomorrow, it’d still take a decade and more for the existing rolling stock to gradually be replaced by new vehicles.

A 10 year period for utility companies to gradually upgrade their infrastructure doesn’t sound desperately unrealistic.