Sab, I'm not sure if this is answering your question, because I'm not sure I understand it as a question. But I'll throw this in there and hopefully advance the conversation.
I do agree that JW's are scolded for using 'independent' thinking, which is often critical thinking---when turned on THEM. However they have no problem when it is turned outside the org, and in a weird way, they did give me some unexpected skills. For instance, it was always appropriate to question and critically look at all other religions. I also remember a lot of 'counsel' about not taking everything at face value, and asking good questions. Again, it was understood that this 'counsel' would never be used on THEM.
So in a way, in that environment, I did manage to hone some critical thinking skills. A favorite thing of mine was to look at those sensational emails people would send warning people that men waited under their cars with knives to slash the tendons in their legs and disable them----or that it was an epidemic that a frantic man would approach a woman at the mall because his baby was sick, and she would toss caution to the wind and run out to help him, where there would be no baby and she would get raped. Or a personal favorite---people were putting syringes full of HIV infected blood on gas nozzles so that when the unexpected customer came along and squeezed the handle, they would get injected with the blood.
NOW, the thing that REALLY irritated me about these urban legends, is that they were often forwarded by a JW. I would rip them to pieces. Point out the flaws. Find the wonky stuff and send them back to the sender with my evidence that it was bullshit. There are no stories on the internet that this has happened even once. The letter states a rash of these crimes in California, yet is signed by a Florida deputy---from a department that does not exist. What city? What state? What mall? This is all left unsaid and untraceable.
The reason it irritated me that it was coming from fellow JWs, is that I thought we were being taught to question such nonsense. I don't know, maybe I was getting a different memo. I think what was really happening is that they were so sure this world was soooooo horrible, that this just confirmed their bias and they had little reason to question. I would tell them that there were enough real things to worry about without passing along fabricated stories.
It was that kind of thinking that led me to eventually put gods under the microscope. When I questioned the belief the same way I would question other stories, it fell apart. I saw no reason to go easy on God---if he is real, he can take it---so I gave myself full permission to consider the possbility and use critical thinking skills.