Kevin,
You cannot possibly belive that only the hook touches the coral. What about fins, hands, the line from the hook etc. I was only there for 7 days and personally witnessed serious damage from all of the above on virtually every hook-in dive and I was with mostly "expert" divers. OK, maybe it is only an area the size of a football field at Blue Corner. I must be brainwashed into thinking we shouldn't destroy coral. Your comment about the damage to Grand Cayman is the exact reason we should be tree huggers and try to save Palau. If you are a dive professional and you don't even care because it is not that large of an area, the reef is screwed.
What if we could not dive some or all of the sites in order to protect the environment? That is EXACTLY what I am advocating. The sites in Palau cannot be visited by the scuba industry without destroying them so people should not go. Once again, I wish I didn't and I am never going back and I am never diving anywhere that requires me to damage a reef.
And, Dennis, believe me I understand how the reef hook is supposed to be used. As you know, the damage occurs when you hook in and touch the reef and then when the line leads away from the hook and rubs on the front and top of the coral head you hooked into. Not once you have inflated your BCD after hooking in and are 2 meters away. You know that. The proof is in the reef. It is already damaged. Anyone with the exprience you have must be able to think this through. If scuba divers of varying degrees of skill are descending upon the reef, day in and day out, hooking into dead or sometimes partially dead coral under a stressful diving situation, there is going to be significant contact with the reef. Compare Blue Corner to the other less-frequented sites. It is more dead.
Lastly, your photo perfectly illustrates my point. We as divers who think we can do this without damaging the reef are still part of the problem even though it may be painful for us to admit. I admit it. I damaged the reef by spending 10K in Palau and making the economics viable for these companies. You did it too even if you didn't touch the reef except with your reef hook. The person behind you grabbing onto the reef is the proof that the diving community should stand up and say this is not working. We cannot continue to dive in Palau on these sites that require a reef hook or holding on and have the reef live. It is a choice. Entertainment for people and a dead reef or we go another way. The choice is yours and ours.