A large number of chassidish girls opt out so they can marry normal litvish boys and be allowed to walk outdoors and drive. Not many litvish girls opt in to the chassidish scene willingly. That’s a better explanation of the two crises than anything you’ve read here so far.
And I can make up another fwo or three theories if you ask. AZ iz a raving lunatic. The age gap theory is, and always was, sold- never bought.