I have found it impossible to get a JW to express their own opinions or beliefs.
JWs are trained NOT to express their own opinions or beliefs. They will have a scripture for everything, regardless of whether that scripture is used in the proper context or not.
"I just know we have the TRUTH." and "I believe what the Bible says."
Unless they are in union with Christ, they do not have the TRUTH.
Take them to these verses:
Christ said this to Pilate: "Everyone who is on the side of the truth listens to my voice." (John 18:37)
Christ also said this: "Most truly I say to you, unless you eat the flesh of the Son of man and drink his blood, you have no life in yourselves." (John 6:53).
The question to ask: If Christ said that everyone on ths side of the truth listens to his voice, and said that they should eat his flesh and drink his blood (figuratively by the bread and the wine), and unless one does, they have no life in themselves, why is it that JWs largely refuse to do this at their annual memorial? And before answering that, keeping in mind that you said, "I believe what the Bible says," the Bible says at John 6:54: "Whoever feeds on my flesh and drinks my blood has everlasting life, and I will resurrect him on the last day." JWs limit this to 144,000, but the Bible does not say that anywhere. The Bible says, "Whoever".