Yes, ~90% of hydrogen production is done for oil/ammonia/methanol, but that is changing.
Long pipelines are actually somewhat easier than short ones, sometimes a simple lining can be added to avoid embrittlement.
There is so much research being done in the area, reasonable document here:
https://h2tools.org/sites/default/files/Doc121_04 H2TransportationPipelines.pdf
"According to a 2024 research report, the United States has 1,600 miles (2,570 kilometers) of hydrogen pipelines; the global total stands at 2,800 miles (4,500 kilometers).[12] The World Economic Forum, in December 2023, estimated that Europe had approximately 1,600 kilometers of hydrogen pipelines.[13]"
Yes there will be leakages, yes the impact is unknown compared to carbon pollution, but in the end we really only have 2 choices, keep burning fossil fuels or go to hydrogen. Lithium is a stop gap IMO.
(20min delay)