Money and control may be the primary issues.
Nowadays they're so paranoid about apostates. I'm sure they've figured out that apostates are waiting near every restaurant door for JW's to appear so they can draw them away with lies, deceit and temptation. Apostates use big words, so the poor, defenseless JW's are impressed by their massive vocabularies and slick presentations. Apostates have good jobs and college degrees. They have good marriages and happy children. Their lives are not always satisfying, but they can change whatever they need to make them better. Apostates are seductive, beautiful, clever, presenting themselves as angels of light to tempt the typical deprived, frustrated JW into a life of making their own decisions and accepting reality with no comforting fairy tales about the future destruction of 99+% of the human race. Oooooooh!