If Tim Cook had calmly said what he did, I’d believe it was just toeing the party line. The fact that he actually got angry, though? He doesn’t strike me as the sort of person who’d fake that, I don’t think that’s the image he wants if nothing else.
He doesn't have to fake it. Dude probably believes that there's no connection between right to repair, unsustainable consumption, and planetary destruction. That might be worse than faking it.