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@argv_minus_one Ok, so when referring to hydrogen as a fuel, I’m talking about burning it.

Fusion is a different beast, and nearly all hydrogen on the planet is useless for it because any feasible design we can build or envisage uses deuterium and tritium. The former it extracts from seawater. The latter it breeds by bombarding lithium with neutrons.

Anyway, different issue. I do happen to think that trying to build fusion reactors is largely pointless too, but for entirely different reasons: the economics will never compete with a shitlaod of solar panels and a big-ass battery.