Heat pumps take outside heat into the building, which means per kWh of electricity they produce more then 3 kWh of heat. Since hot water can be stored with ease, all it takes a big water tank with good insulation, hydrogen storage is not needed in this case. Also there are to the best of my knowledge no boilers able to burn both 100% hydrogen and 100% natural gas. The 100% hydrogen ones are even more expensive then heat pumps right now. That is to purchase running them is even more expensive.

This is a fairytale to pretend hydrogen can just be used instead of gas to not see a huge push for heat pumps, but keep gas infrastructure in place.

however the cheapest way to make hydrogen is from fossil fuels, so it also continues to line the pockets of the fossil fuel industry until people figure that out and mount enough pressure to force another transition

Green hydrogen makes sense as a means of storing electricity from renewables, and for use in some transport applications where batteries aren't workable. But it's quite inefficient so it doesn't make sense to burn hydrogen (green or otherwise) as an alternative to heat pumps. And it's the "otherwise" that really matters. Making home heating dependent on hydrogen opens the door to other colours of hydrogen, which is exactly what Big Carbon is pushing for.

Yeah that's stupid. We won't have a abundance of hydrogen, or extra energy to burn for years to come. This hydrogen boiler thing is just a measure to stay on fossils for longer, because certain models will have problems with it and there won't be enough hydrogen available. Which means oil companies will benefit.