@hopfgeist Then you are saying the same thing people said about wind, solar, batteries, etc. That they will "never be cost effective or practical."
In the long run, the price of fossil fuels will go to infinity. Meanwhile, renewable energy will never use up any resource. And if you think generally, about how you are just using wind, sunlight and water to make fuel, then it is simple enough to project that green hydrogen will cost next to nothing in the long run.