The following is partly based on comments from the Book The Gnostic Gospels on Page 123.
Why do some leave and others stay?
Some seek their own interior direction, they reject religious institutions as a hindrance to their progress. I think I am tending to viewing the JW religion has a hindrance in my quest for understanding and progress.
Others willingly participate in religious institutions, regarding the religious institution as and instrument for their own self -discovery. Or more likely, for a Witness, as a social instrument to keep family and other social ties intact. It is understandable that it is so difficult to leave friends and family. It is sad that one must choose between current relationships and other choices.
Zarco