It is true that the reef near Belize has become more damaged from ships, hurricanes and perhaps, climate change, in recent years, and many groups have banded together to stop the damage. This is one reason that additional piers may not be built in Belize.
The U.N. and the WWF are the two largest organizations working to preserve the reef.
It may change depending on where the dollars go or come from. The cruise lines may kick in dollars for perservation in exchange for a passage through the reef. It's been done before. Who knows it may help.