Hi, KH...and welcome to EvC
I believe that it is extremely unlikely that any group of people have cornered any market on truth. You may point out that, logically, JW's have had a spotty track record on official proclamations or revelations.
I would support her desire to understand Jehovah, but I would encourage her to be unafraid to question whatever it is she is being taught. After all, if Jehovah is as loving and all knowing as is asserted, He would have no problem with her honest questions. Questions are, after all, better than answers.
Only through questioning will anyone ever grow.
Psychologically, the only allure of such an organizational setup is that it provides human leaders with a sense of entitlement and positional authority over other humans. I personally believe that the relationship between Jehovah and His people is not exclusively limited to some.