Because the bible is a Catholic book, they would be the ones to tell you what it means. They put it together, they protected it through the centuries, they use it in their liturgy, it's their book. Why would anyone care what a JW thinks about the bible? They have no authority in it at all. None
The WTS is just another 19th century american invention re-branding what was already established.
That's why there's so much new light. Another group of JWs come into power and they interpret the scriptures according to their own ideas instead of what Jesus commanded
my 2c