Oh, I'm sorry - I thought you were a FORMER Witness when reading your previous post/comments. I had no idea you were not connected to the organization on a familial or emotional level. In that case, thank you for taking a critical interest in the organization!
The thing is with Jehovah's Witnesses, they have a strong illusion that they DO know their organization's history due to the material that "covers" (read: white washes) their legacy. Jehovah's Witnesses are currently studying a book entitled God's Kingdom Rules. It is carefully packaged as a walk down memory lane for the Society, but cleverly (and often brazenly, since there are not many left who were alive to verify the statements) omits and misrepresents things as they happened.
Your typical Witness will gladly tell you that they know all about Pyramidology and the whole shebang. What they know is just a version. A neatly, little packaged version where things actually make sense and don't sound so crackpot.
Many Witnesses DO believe they have successfully converted people with knowledge of the Bible with their use of the publication, What Does the Bible Really Teach? Since this book has scriptures peppered throughout it to support the Witness doctrine, many Jehovah's Witnesses experience the wondrous pleasure of "opening the eyes" of those in so-called Christendom. The kind of knowledge YOU seem to be talking about is a little more unshakable and assertive. Perhaps you are of the minority that Witnesses struggle to have success with.
Are you scholared in theology? Or an avid participant of a particular denomination? Either way, keep up with those questions you've posed to the Witnesses at your door. You should maybe make a post about what you asked them!