She's gunna get gray hairs in this conversation, she can feel it. (Or gray feathers. Whatever.)

"Because I care about you! And when you do things that we've seen put people in danger, that makes me concerned! The science and logic don't matter to me at all! I don't care if a future you time-traveled right now and told me you'd be fine and healthy and live to be a hundred and twenty, I STILL CARE WHEN YOU ARE IN DANGER BECAUSE I CARE ABOUT YOU PERIOD!"