[jabretti]

Orcas seem to have fairly specialised diets -- there's different subspecies, each of which eats something different.

https://seaworld.org/animal-info/animal-infobooks/killer-wha...

>Type A whales eat mostly Antarctic minke whales and have also been observed hunting southern elephant seals.

>Large type B whales eat mainly seals, especially Weddell seals, and also hunt minke whales.

>Small type B killer whales have been observed hunting penguins and are believed to mainly eat fishes.

>Type C killer whales mostly eat Antarctic toothfish (Dissostichus mawsoni).

>Little is known about the diet of type D killer whales, however, they have been observed preying on Patagonian toothfish (Dissostichus eleginoides) caught on longlines.

So if type C whales don't eat seals and type B whales don't eat fish, it's not surprising that no whale type likes to eat humans -- they're apparently just picky eaters.