There are two primary false assumptions made by the Watchtower:
One is that the Bible contains the thoughts and demands of a supreme god.
The second is that only the Watchtower/JW org leadership have the exclusive spin rights on how to interpret it.
Therefore the GB think that all they need for any situation is to find a scripture relevant in content to the problem at hand and that will suffice-- so forget the original context or meaning. Trotting out scriptures regardless of meaning keeps up their reputation as a Bible quoting religion. The JW governing body are world leaders in "post truth" thinking!
This matter is so clear when reading the gospels about the prevailing anxieties by Jews and the end of their system. As crazyguy mentions these were written close to the time of the sack of Jerusalem in 70 AD under Vespasian. The so called Third temple only recently built was destroyed and broke the power of the Jewish leaders and closed the Sanhedrin.
The Greek scriptures were written for a new Christ cult which was growing at the time but were relatively few in number and mainly Jews. As yet they were not centrally organised apart from holding meetings in the manner of prevailing Greek and Roman cults, from which they derived their heirarchical orders; bishops, prebyters and deacons --still in use by JWs in modern translation.
The words of the gospels are categorically not those of Jesus of Nazareth.
Nazareth did not exist when Jesus was supposed to have been born! No one ever took down verbatim what Jesus said, mainly because nobody known to history actually knew him or reported his words or activities first hand.The gospels are the fabrications of the leaders of a new christ in a historical background of many christ cults which preached destruction of the world and salvation by belief in a resurrected christ figure--which was an evolving twist on an ancient story.
My favourite which says it all is Mark 9;1.