It's a religion which obsesses over factual proofs (counterfactual though they are) of its veracity rather than faith, so it's inevitable that most who leave will do so for intellectual reasons
I'm not sure that this is completely accurate. They do a great job at making people believe that that's the case, but no, that's not what they are there for. Their main purpose is to exercise power over other people, not even money. Their teachings and all that study that they have to people doing is just the means, not the end.
To answer your question, being a JW wasn't my choice. That religion was shoved down my throat since I was born. As soon as I had the choice I left.