I already said this . . .
How about we move the discussion to an ocean that more of us are familiar with: The North Atlantic.
I you were racing across the Atlantic, say from St. Thomas, USVI, to Halifax, Nova Scotia. Right about halfway along the track is a tiny island you wouldn't see from 10 miles away if you didn't know it was there. The difference between this island and the one Vestas Wind found is the everybody has heard of Bermuda. And anyone sailing across the Atlantic would say to themselves, "I'd better not run into that!" and would make a note -- or draw a big red circle around it on the electronic chart.
Somebody didn't do their homework.
I agree that it's not the chart that's to blame.
If anyone is to blame, it's the navigator who didn't study the route closely enough before leaving Capetown -- or even before the race started in Alicante.
If there was a huge and popular biennial race to Cargados Caragos, this would never have happened.