Real life is not a film. We're talking about a disorder that's likely caused by a traumatic event and is associated with _proper bad_ anxiety. You don't necessarily respond to logic in those cases, you respond to things to which you have a strong emotional response -- and which will, hopefully, comfort you.

Reversely, when you see someone in that state rushing for the door, knowing they'd be helpless to deal with actual risks, 'de-escalating' is the least of your concerns. "I must keep her safe, with me" is the only thing in your mind.