I have to agree with you, because I've seen detailed instructions, schematics and photographs of the apparatus for refueling a hydrogen fuel cell based UAV. The

I have to agree with you, because I've seen detailed instructions, schematics and photographs of the apparatus for refueling a hydrogen fuel cell based UAV. The pressures of the tanks involved and connectors, pipe and hose system do not look like something you would want millions of ordinary untrained end-user consumers attaching to vehicles. Everything needs to be perfectly clean and in pristine condition in order to be safe. People already manage to start fires and cause disaster at gas stations doing something as simple as putting a nozzle into their car and filling it with 87 octane gasoline.