I remember I read it before but I can’t find the source, will update this comment if I find it. Keep in mind, Orcas don’t kill us either, not just as a food
>"They're killing the porpoise, it's already dead or dying. And with one bite they can eat the whole thing. Yet these whales just don't see these porpoise as prey. And I think it's the exact same thing with humans—they don't see humans as prey. Thank goodness, they don't see humans as play toys.”(1)
Sharks on the other hand, mostly they don’t eat the humans they kill, they just kill and probably realize we don’t taste that good after the first bite, but unlike Orcas, they are not as intelligent and/or able to teach and pass this info to their kids.
Orcas are some of the smartest creatures around, it is entirely possible that they can see the connection between humans and ships and realise there is something going on
Orcas eat moose and they are more bony than us I think.