There's a number of use cases where clean hydrogen will be desperately needed. This starts with areas where hydrogen is already used today - but it's hydrogen made from fossil fuels - like ammonia production and includes areas like steel production where hydrogen really is the only game in town for a low-carbon production.
We'll need all the clean hydrogen we can get, and probably more than that. There's no plausible scenario where we'll have excess hydrogen that we can waste in an area where it's just vastly less efficient than the available alternative.