Any possible reasons why orcas don't attack(not eat) human?

[sam1]

..that still doesn't explain the no exceptions to the rule.
By the simple law of probability, out of many thousands of interactions through many decades, some orca should've attacked some human.
But it just does not happen, ever. It is a complete precedent in comparison to any carnivorous human killing capable apex predator that interacts with humans.

If we assume that orcas are collectively aware of the potential of humans to harm them, then why are they often acting curiously and friendly towards us?

I think Orcas posses a phenomenal intelligence based intuition towards humans.
It is a feat without precedent in entire natural world (humans included)

[theropod]

Well, there are orca attacks on humans, are there not? Just no fatal ones, except in captivity. Which is weird enough considering even bottlenose-dolphins have killed people.

[sam1]

No, there is no recorded instance of orca attacking a human in a true, deliberate, injury causing sense. There is one case of a male orca grabbing a diver in a likely playful/curious manner.