As a fly fisherman I have to agree. Most fly fishermen put a lot of effort into saving fish. The general rule is to use barbless hooks and to never remove the fish from the water and to handle it with gloves to improve its chance of survival.
But I will admit that most fly fisherman do not keep their catch. The vast majority is catch-and-release, which receives very open criticism. But in order to protect the sport, most fly fishermen go to extreme efforts to protect the species.
Likewise most hunters actually go to extreme measures to protect environments they hunt in. And hunting tags and fees are the largest source of funding for environmental restoration programs. Hunters also commonly contribute to conservation programs. A few bad hunters that make the news tend to spoil this reputation. But if you enjoy the outdoors, hiking, and other similar sports it is thanks to hunters that a lot of those programs are funded and continue to exist.
In both these cases, The humanity of the animals and the protections of their species and environments are encouraged strongly throughout the community.
Shark finning is very much the opposite. No care is provided to the humanity of the animals. An equivilant western version of shark finning would be hunting a bear or wolf (a protected diminishing species), then cutting its liver out while its alive, and then leaving it helpless in the woods to die slowly over the course of the next few hours or half a day.
While I understand everyone's argument that ethnocentrism over eastern beliefs prevent us from understanding this practice. But there is a line that needs to be drawn between the humanity of an animal and the conservation of its species. Neither of these factors are being considered in Shark finning. If they want to eat shark fins, I don't inheritely have a problem with that. But programs should exist to propagate the shark species. Also the animal should simply be killed before harvesting. If those conditions were met, I don't think the practice would receive anywhere near the scrutiny that it does today.