sbf,
Let's use the analogy of a marriage gone wrong to explain one way to look at this.
If you continue to look back in bitterness, and say it was all bad from day one, you are labelling yourself stupid for making the wrong choice. It helps to look back at how you felt in the beginning, to remind yourself that it wasn't stupid, that (s)he had good qualities that first attracted you.
Everyone and everything has shades of grey.
So, as a JW, there were things that were not all bad at the beginning (or whenever) for some individuals. There is nothing wrong with looking back, and trying to glean at least some usefulness or purpose from the experience.
Personally, I was born and raised, and faded at 18-20. They stole my childhood, my innocence, took my educational opportunities, and did a lot of damage.
BUT, like abaddon, I choose to look back and say, YES there was at least one good thing that I took away from it --- I learned how to speak publicly, etc.
This does not in any way negate my experiences of abuse by the Tower.
tal