I mean, i don't know, if you can't come up with a single clear cut example in the wild in all of human history, i think that is enough to put them very low on the threat list.
B) according to the article there is no consensus among scientists that any of these incidents actually constitute an "attack". So if we are being this level of pedantic, its arguably true that "There have been exactly 0 known deadly attacks from wild orcas in history."
"Wild orcas have never been documented hunting or eating humans, so it is unlikely this relates to wanting a meal." (quote from https://www.newscientist.com/article/2378796-why-have-orcas-...)
Elephants that trample humans also aren’t looking for a meal.
> It's a lot like when we "share" our worms with fish.
So, it is a relevant distinction, the theory of that comment is that they are using them as bait for humans. That they aren’t ever recorded as intentionally killing and eating humans is relevant.
They fight boats for other reasons apparently, maybe they or territorial, or maybe the boats are making some annoying nose?