You could ask your wife about a dozen and more core JW beliefs and where in the Bible is it found and she or no Elder would be able to give you a definitive answer to your question .
To many of the rank & file its purely an emotional attachment to the religion ,they have their ears tickled ,it sounds good . No more worry,live in a paradise earth,no food or accommodation worries,no sickness or death .
Who wouldn`t want to live under those conditions and they just WANT TO BELIEVE IT.
Jehovah`s Witnesses aren`t the only religion who teach and preach these things ,none of which can validate their claim anymore than the JW`s.
To name a few.
The Worldwide Church of God.
The Seventh Day Adventists as well as other Adventist movements
The Christadelphians
Just to name a few.