It's just a matter of scale. make your tank 4 times as big and the surface area for leakage only grows by a factor of 2. also there is already a natural gas grid that can take a lot of hydrogen without modification. Again this really only ever makes sense if you have an absurd energy surplus as a sort of last resort way to use energy that would otherwise go unused. In terms of actually being a desirable power system it seems like a complete nightmare to deal with unless you need to go really far out on the gravimetric energy density front with very low power density all while having a fraction of the efficiency of battery electric

This is false. h2 storage is a solved problem, people store, transport, and use h2 all the time.