Because you can't always have electricity available at super chargers. How do you power your car if the wind is not blowing and it is not daytime? You will need energy storage, something hydrogen provides in spades. That ensures hydrogen will be needed and be very cheap since it is made from wind, solar and water alone.

A pipeline is cheaper than a wire at moving energy around. About 10x cheaper in fact. This is just another example of BEV FUD. BEV companies just make shit up to demonization the competition, and often times the exact opposite is true.