Thanks. Having traveled with some of these folks in the lates 70's I can say that they are committed to their cause and are not afraid to take a stand. It's so dangerous to ride a bucking zodiac while running interference between a harpooner and a target whale.
As per cultures - they are designed to change. Cultures hold on to what works, and change, evolve when needed. Cultures that don't evolve slowly wither away from attrition. Consider the Shakers. Additionally, telling whaling cultures to consdier taking a break from harvesting a global species isn't off boundaries. The moratorium was just such a break, but ultimately whalers didn't have much in the way to harvest and make profit.
Funny that someone mentions how we should think. What mental model are you using?