The article isn't about solving those problems, it's about taking a few days longer to do the actual travel to save a bunch of money, since there's already massive delays on either end.
No, the article is saying "actually I was wrong about being longer and slotting in between airplane and cargo ship; we can be as fast as planes, but cheaper, and take a big slice of that whole huge market". Which is why they need to explain why airships won't also have customs etc.