As an expert in risk analysis, please provide us with one real world example of an actual catastrophic event where hydrogen being used as a fuel was released into an enclosed space and caused an actual catastrophic event resulting in death, injury or any type of major damage.
Despite hydrogen being used as a fuel source for vehicles since 1860... there have been no deaths or injuries associated with hydrogen being used as a fuel that I or presumably you are aware of. I worked as a Hazmat Officer in charge of a Hazmat team for many years. And yes, I went to many serious Hazmat calls during my career. You are the one who is operating on idle speculation and false presumptions.
From a Hazmat officer's perspective hydrogen is a near perfect fuel. If a large quantity is released into the atmosphere, it dissipates almost instantly and causes no environmental damage. H2 weighs 16 times less than O2.
And yes, hydrogen can be used as a cooking fuel inside of houses with risks that are likely less than that of propane or natural gas. I don't know what type of event you supposedly witnessed that you have blathered on about while providing no details... but it didn't cause a catastrophe... did it and probably was not likely to.
As I told you in another post when I was a kid my friends and I used to make hydrogen balloons using lye and aluminum foil mixed in bottles with the balloon covering the neck. We taped firecrackers to them. We would light them on fire while we were holding them in our hands. We wrapped large bundles in toilet paper and lit them on fire as they floated away. Although I would not recommend these activities to youngsters in our current overprotective society... this provided wonderful entertainment for us. The hydrogen was not as dangerous to us as the firecrackers or lye. I do not remember any serious injuries or burns to anyone or resulting fires.
It may be an idiotic waste of resources converting electricity or natural gas to hydrogen... but as electric cars eventually fail spectacularly in the marketplace this is what is coming next.