Other Apostles of the Bible were not afraid to engage in religious discussions (Peter in the Temple Court yard), Paul before Festus, King Agrippa and Bernice, Paul before the Emperors of Rome and his religious consorts or experts.
I don't see the Watchtower's Scholars of Fame engaging with the World's Religions or MetaPhysical discussions, why? If Fundamental Christians, Catholic and Anglican Church Apologist are not afraid to debate topics with Scientist, how come the people who claim to be "Jehovah's Only" don't share in the "Thought of Public Ideas"? I think they would get destroyed, no way any Watchtower Experts could debate like Christendom's, for all the hot air and smoke the Tower blow's in it's members faces, you would think they would show what they are made of by debating the relevant topics people are concerned about instead of hiding in their Ivory Tower and when they do speak, it's only to the choir, they don't challenge the intellectuals of Society, why?