Anyone that has ever had to deal with hydrogen knows it's leaky. Can that be overcome yep, not cheaply though.
I'm sure those words were spoken about propane, natural gas and maybe even pocket cigarette lighters but it got figured out. Back in 1999 I was in Munich, Germany and saw several hydrogen powered BMW's running around town and the very strict Germany TUV and government didn't seem to have a problem with them. It will get worked out and be just as safe as your propane gas grill, gas/propane stove/oven, gas/propane HVAC home system and be much more convenient than charging a battery. Hydrogen/EV hybrid is the real future IMO....it's not too far around the corner.
