There is good reason. It is the death threat, and the threat of ruining family and financial lives, that keeps most of them in. You leave, you are not prepared to function outside the cancer and will fall flat on your face and enter dorkhood trying to learn at age 25 what you were supposed to have learned at 5. That is the only thing keeping them in, as pretty soon they find out that the death threat is a scam.
Life in the cancer is sterile, and getting worse. You don't do any holidays or birthdays. There is nothing to do after school--no after-school sports (immorality, time for practice getting in the way of your boasting sessions and field circus). There are so many hurdles to getting sex. You can't gamble--not even buying a single scratch off. And it is getting worse because they are doing away with the gatherings outside the boasting sessions. No longer do you see those parties where 40 or 50 people rent a pavilion and play baseball, enjoy a picnic, or listen to real music. No longer do you see those rollerskating parties. It is getting so all there is is boasting sessions and field circus--the Sept 2010 Kool-Aid Washtowel is going to make this even worse.
Now, old people might not have the energy to do much more. If you are in your 80s or 90s and in very poor health, chances are that doing anything that the Washtowel Slaveholdery forbids is going to be too much for you anyways (yet they still want you to pio-sneer). But, people younger than 80 or in good health (even people in good health beyond 110) will want to enjoy an occasional picnic. And, if you have children or are in the 18-35 group, you have to worry about your future. There is just so much boasting session/field circus that younger ones can tolerate, and they are not going to prepare for the future if the Filthful and Disgraceful Slavebugger continually tells them to donate all their time for field circus and their money to the Worldwide Pedophile Defense Fund. And, if they have children, they are going to want something better than a stagnant existence with boasting sessions, field circus, and/or Beth Hell for them.
This is precisely the group they are having a miserable time holding onto. Under 18, you are stuck with parents. From 18-35, and to a degree from 35-75 or 80, you need more stimulus and fulfillment in life than going to the same doors and knocking on them repeatedly. Only those that are too set in their ways to learn new thinking patterns or those in extremely poor health and ready to die are going to be satisfied with this arrangement.