Blackfish director Gabriela Cowperthwaite throws a lot of information at us in less than an hour and a half, and it’s all crucial to making sense of the narrative she follows in her searing, heartbreaking, somber film. The good news is that she’s an ace filmmaker, and she knows how to convey everything that we need to know effectively, efficiently, and with clarity, but that knowledge must be served with a simple caveat: you can’t unlearn what Blackfish teaches, and that’s both a blessing and a curse. Cowperthwaite’s picture documents inhuman abuses inflicted upon non-human creatures in stunning enough detail to turn even the most dedicated SeaWorld fanatic into an outraged protester. In…