The ship was safe. The water was deep enough. The anchorage presented no threats to the ship.
I think you are over-representing the responsibility of the captain of a ship.
It's entirely reasonable to say that they did the job the best they could, but that circumstances were such that the ship still caused damage to the coral, through no fault of the ship's captain.
Lots of things that a captain can't take responsibility for - particularly when it doesn't involve the safety of the ship and it's passengers.
I think you are over-representing the responsibility of the captain of a ship.
It's entirely reasonable to say that they did the job the best they could, but that circumstances were such that the ship still caused damage to the coral, through no fault of the ship's captain.
Lots of things that a captain can't take responsibility for - particularly when it doesn't involve the safety of the ship and it's passengers.