When I was in, in the good old days, you had brothers and sisters of the anointed who would give long answers in the Watchtower that showed how much they had drilled down into the meaning of the verses. As a result, I prepared my answers quoting references to (for example) Vine's Expository Dictionary of New Testament Words to draw out the meaning of a certain Greek word in a verse.
Nowadays I am told that the WT says the answers should not exceed 30 seconds, and that the first answer should be direct from the WT article, which is why I heard that they take the hand of the youngest kid in the audience who probably has been told what to say by one of the parents.
What I am getting at is that no one can express their deep study in such a short answer, which is why the average JW probably doesn't bother to study anymore.