JWs often think they have 'the' answers to 'important' questions that other churches 'can't' answer. (This generally means that the answer given by other religions isn't the JW answer.)
The JW approach is sometimes useful for people who are after an answer - that is any answer - to their questions. It's a deeply ignorant approach to life.
One of the 'examples' touted occasionally in JW literature is the supposedly 'satisfying' 'answer' to Where did Cain get his wife? - He... shagged his sister or niece... ah... what a 'refreshing' answer.
Of course, if someone asks a question JWs can't answer, well that 'must' be something we just 'don't need to know', which is awfully convenient, so they're left 'waiting on Jehovah' (which is entirely meaningless).