This is a great comparison, OTWO. In real life, I don't know many adults who actually believe magic is real. They might go to a magic show just to be amazed at the slipperiness of the human mind or at the incapacity to see that things might be working differently than they at first seem. But, they don't believe it is actual "magic."
Children might be fooled. They don't have enough life experience to know what they don't know. Likewise, Witnesses don't have enough exposure to the real world to realize they might have been fooled. Children grow up and gain experience, but Witnesses stay in their own world without much exposure to critical thinking.
Like some have said, some people's minds are more predisposed to doing the critical thinking necessary to deconstruct the circular logic, and those are the ones who escape. But, those who just aren't critical thinkers and who like to be followers have a much more difficult time thinking outside of the Watchtower magic box.