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Neither natural gas nor hydrogen leaks in appreciable amounts in pipelines. They do care about profits, and leaky pipes lose money.

You do not need 4x as many ships. You just need bigger tanks. Hydrogen is much lighter than LNG. Bigger tanks are not an issue. You're hearing straw-engineer arguments from those with a vested interest to BS about these issues.

[theshrike79]

The video I linked to was "Michael Liebreich’s Keynote Speech at World Hydrogen Congress 2022"

Why would the World Hydrogen Congress have a "vested interest to BS"?

The speaker is comparing a LNG ship to a prototype Kawasaki LH2 ship, with actual values for both.

What he's suggesting is that we transport ammonia instead of LH2, ammonia is a lot more stable to transport and can be converted to hydrogen at the destination.

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Michael Liebriech could easily have a vested interest to BS. In fact he probably does since he has made similar statements in the past.

Ammonia is an option too. But this does not preclude other ideas.