You're projecting human reasoning onto this whale. We've evolved the idea that killer whales don't attack humans because humans aren't their typical prey. But the same should hold true for other predators; lions, tigers, bears, etc. And yet we have seen enough of those types of attacks as well.
These are predators that have evolved over millenniums. Just because they haven't normally attacked humans doesn't mean a mistaken act won't trigger an impulse. While I agree that this whale should be returned to its proper environment instead of being destroyed, I can't agree that cavorting with predators is a sound practice.
(Seeing mental image of Judy Garland as Dorothy Gale on the Yellow Brick Road saying "Lions and tigers and bears! Et cetera!)
Then make sure all the proceeds go to her family.
Happy ending