None of these hunting tactics have anything to do with self defense. There is nothing safe about shooting a polar bear in the butt with a .22. Hunting whales from canoes definitely is not safe and the Inuit will tell you so.
The above is the only point I'm trying to make. Not argue about shooting a defenseless bear under circumstances that have nothing to do with stopping a large carnivore in the process of eating you for breakfast, or protecting it's young.