I completely agree that green hydrogen is prohibitively expensive at the moment and it currently makes no sense to burn it for electricity generation. But it will likely be necessary in the future if we are to decarbonise aviation fuel, steel making, fertiliser production, etc. What matters at the end of the day is reducing total carbon emissions for the whole economy.

Intermittent renewables and batteries will get us to 80% carbon free electricity generation for more quickly and cheaply than nuclear. While nuclear might make sense in the very narrow use case of 100% carbon free electricity generation, given we also need to decarbonise non-electrical emitters, it will probably reduce more carbon emissions per dollar spent to instead spend that money on even more cheap intermittent renewable generation capacity and use the excess to generate hydrogen. At the point hydrogen based fuels may make sense to use as a buffer for intermittent electricity generation.