It's quite simple to understand the dynamics of why the number of "stuck-in's" is so high.
You are the husband of one wife, you have family and friends all around you who are JWs. If you decide to "burn the bridge down" on your way out, you are at the mercy of Time. How much time on average, for the lightbulb to click on, "something's strange about the over-lap gen"?
JWs are not as forgiving as you might think, some thrieve off pain and suffering, judging others as evil. Your viewers on Youtube need to calculate what is their freedom worth? Is the value of pretending better than losing all contact with my wife and family (brothers and sisters, cousins, nephews, nieces, aunts, uncles, conditional-life-long friends).
Plenty of JWs have businesses that require interaction with other dubs, other's rely on the fellow dubs for work, help and comfort. Too many variables and emotional ties to count the cost of, not a easy choice for anyone.