It has to be that to be a good thing, but it doesn’t have to be that to exist.

It actually does. Making H2 from NG, for heat/transportation, is using NG with extra expensive steps. H2 already exists as a fundamental chemical (including Ammonia) for agriculture and rocket fuel. An H2 economy is for expanded use, and green H2 is only economic possible case.

It doesn’t do much good to have longer range if you can’t carry enough cargo because too much of the plane is taken up by fuel tanks.

fatter planes with fatter delta wings.