No. I don't want to hijack this thread with a discussion on the ethics/morals/positives/negatives of reef keeping, however it is the uninformed public that sees reefkeeping as a detriment to the reefs.
The fact is, global warming is destroying reefs. Those aquarists who propagate marine life may actually find one day to be the ones to restore our ravaged reefs from the pollution. Those working diligently towards tank bred marine fishes, may help restock reefs. There are more than 80 fishes known to have been captive bred.
Reef fish suitable to captive life, live longer in the captive life, on a relative basis. That is, more fish live longer than their same numbers on the reef. Disease, predation, and starvation take their toll on the wild population of fishes. To maintain this kind of statement of course, requires that the person is an aquarist and knows proper fish husbandry. I find in general, those that usually don't care, don't go on the Internet to gain information, help, and recommendations about the hobby. They are the ones who the public objects to (and rightly so, IMHO).
The marine hobby does benefit reefs by bringing to the public's attention the beauty, diversity, and magnificent life in the ocean. This can inspire and also educate those around us who see our marine systems with part of that outcome being an interest to preserve that ecosystem. There are an estimated 25,000 fish species on this planet, about 75% of them are in salt water.
The matter of the hobby is debated, but not amongst those who really see the exchange for our amusement to the benefits. The key is 'responsibility' in the hobby. In the case of cleaner fish, the outcome is all negative. The end study is that the cleaner fishes don't live very long in captivity; their capture has the opposite effect on their longevity; and their removal breaks down the reef fish population, which proper collection doesn't. Proper collection is a 'thinning process' saving many young fishes from a high percent of death if left on the reef, when put into proper captivity.
I won't expand on this in this thread.