If there's a pressurised tank and something pierces the car. its not necessarily kaboom. H2 is lighter than air. It disperses. Its burn patterns are different. I don't doubt its scary but the assumption it's worse than other fuels is an open question. It might be better than LNG in some circumstances.

As I said, the goal is not H2 tanks. Did you read that? do you understand how sintered metal H2 storage works? or NH storage? (NH is btw, also scary bad. people used to die when ammonium refrigerators leak)