It has already been said, but you lost control of the discussion. When the elder swithched the topic to his "safe ground" of the wonderful organization vs. the darkness and emptiness outside. Its all conditioned response. They live with the fear of being outside the organization because the organization tells them outside it dangerous and scary. When you question whether there needs be an organization his response assumes one by asking you where else are you going to go to to find the organization God is using. It may surprize some but the Moonies use the very same logic to dispell thoughts of leaving among its members. This is in fact a common trait of cults. This emphasizes the need for us to make clear for those we talk to that they always have us to go to for support, that is, there IS somewhere to go to.
The next step for the Elder is to casually suggestt hat you are harboring secret sins or desires to sin and this trivial matter is simply your weak haert seeking justification...... This is design to now trigger all the guilt feelings you naturally feel for doubting and likely feel for private thoughts or actions. This conversation is now fully turned on you rather than the WTS hypocrisy and dishonesty. Many turn red like a lobster and ask for 'help' with these thoughts or with doubts. Its all conditioned response and Elders are experienced in using them.
The very best approach to exiting is ,IMO, a critical study of the Bible itself. This reveals the true nature of this collection of writings and the varied theological stances within them. It is not surprizing that there are a number of passages that emphasize a structured hierchy. That was the purpose of the passages being written. Control by a infant proto-Orthodoxy. Clearly it is possible to find aspects of the Bible valuable even inspiring without becoming an unwitting pawn in a 1900 year old bid for control.