Not really. To get it somewhere to work on you have to bring it to shallower waters which have much more life in them don't have the same pressures and temperatures etc. If it sinks there it's a big problem so they've decided better to end the journey now and sink it where its less of a problem.

It's a damned if you do damned if you don't situation. It's more about harm mitigation at this point. The options to salvage it put a lot more critical areas at much more danger. But they let the ship get so bad that they can't do anything now. It's kind of like windmills, sure they kill birds, but global warming is going to do a hell of a lot more damage to birds.