Oh, I understand what you're saying. And I agree, to some extent. Queenie is supposed to be "people-smart", so it's sad to me that she gets sucked into Grindewald's web of misdirection. Yes, smart people can and do make bad decisions, and I accept that, both in life and in stories. I understand, from a writer's viewpoint, why she was the one chosen to defect. And I understand, from a character viewpoint, why she chose to go with Grindewald. But my understanding and acceptance don't wipe out the urge to give her a good shake to try to bring her to her senses before it's too late.