Natural killer whales are afraid of revenge, so they avoid humans. Black whales are divided into ocean-going international whales, passing whales and working whales according to their living habits and customs, and generally kill whales. Dolphins are mostly ocean-going international whales, and many individuals will kill them when they rush to passing whales. There are many sea lions and seals killed, so it is not easy for working whales to avoid land. They mainly feed on fish and can swim with sea lions and whales. Once they see the natural killer whales in the sea on land, they want to swim with them. That is a very risky thing. Working whales are not easy to be aggressive to humans, but it is difficult for humans to distinguish the differences of various killer whale species, so there is basically no record of people traveling with natural killer whales, and great white sharks include fierce tiger sharks cf white shark hammerhead sharks. All human beings have the personal behavior of traveling with them.
I just think it's possible that killer whales think that humans don't have a menu, just like humans look at some animals that can't be eaten. Because there are basically no enemies in the deep sea. When you see human beings, touch them with curiosity or fun. Later, it was found that human beings left after watching the excitement, without any attack ability. Because killer whales are particularly partial to food, fin whales only eat their mouths, and great white sharks only eat their livers. It can be seen that killer whales like soft and digestible high-calorie ingredients. People's meat is stuffed with firewood and tastes terrible. Black whales don't want to feel sick and nauseous!
It's not that you don't eat people, but you can't eat people. Humans live on the mainland, and killer whales live in shallow waters. There is no intersection of physical distances, so killer whales have no chance to eat people. If you have been swimming in the waters where killer whales live, it is not easy to talk about it. If the killer whale has just eaten enough, it is likely to turn a blind eye to you. If they are hungry, they can ignore what kind of animal you are. As long as they can tell whether they can eat or not, you may be doomed. Cruelty doesn't eat everything, and carnivores don't eat everything. For example, other animals are also curious. Humans are so cruel that they hardly eat, but why not eat dung beetles?