The airport you mention is also the most expensive airport in the world, by some measures, and the construction of which was a complete fiasco. So I’m not sure what to make of your other comments. Anyway thanks for the reply.
Yes there were issues with getting it certified because of the unexpected wind sheer.
None of this negates the value of a Internet cable. Indeed it doesn't negate the value of the airport in extending the local economy.
Given the remoteness of the island, and the low population, things will tend to be more expensive than in other places. That doesn't mean we should just ignore the place.
If we develop rural areas in general with good transport and digital links, we encourage populations to disperse and not just congregate in cities. Which imo is a generally good thing.