JWs become so heavily invested in JWism and all it entails that over time it becomes ever more difficult and frightening to even try to conceive of a life outside the Wretchtower walls. Put yourself in the shoes of a random JW that you know and imagine being that person and leaving the bOrg and creating a new, post-JW life for yourself. For me, that mental exercise drives home why so many JWs muddle through, year after year, decade after decade - JW culture has evolved in such a way that to leave it is a trauma that few inside are capable of going through. The prescribed, group-mind existence becomes so written into the mental circuitry of JWs that an independent, autonomous existence and it's accompanying lack of certainties and absolutes is simply unfathomable to your average dub.
So if you're one of the millions for whom leaving that sh!t is a mental and emotional impossibility, then you have just a couple of narrow choices. You can muddle along, putting in a few FS hours a month, work a normal job where for the most part you avoid discussing JWism (because deep inside, you KNOW it's weird but it works for you), and suffer from a guilt-stricken conscience for not doing enough and resign yourself to the fact that you "probably won't make it" (how many times have you heard that phrase come out of the mouths of JWs you know?)...OR.... you can keep the guilt at bay by giving yourself completely over to it and becoming as close to a "model" JW as you possibly can.