Thanks for the explanation, it makes a lot of sense. I would point out a few things. It’s legitimate for you to adopt the position that the church doesn’t need to justify its position and that others must prove it wrong. At the same time you shouldn’t be surprised that others don’t share that perspective, so there may be an impasse on that point.
To explain why I quote scholars rather than my own inferences from grammar and so on: I am no expert on grammar, syntax, text criticism and so on, so I think it would be presumptuous for me to make definite statements of my own. Very few experts have earned that right in my opinion, not everybody who knows some of the language or text history. When I quote a scholar who agrees with JWs I am not arguing that this proves JWs are correct because scholars agree with them. What I am saying is that, since there are senior scholars in the field who agree with JWs, it is at least a legitimate way of reading the text and should be respected. Because opponents of JWs sometimes give the impression that there is no support for their rendering of John 1.1, for example, when in reality there is quite a lot of support from a variety of competent scholars who approach the text from different perspectives. This is certainly lost in the rhetoric of some anti-JW literature that talks about “monstrous translation”, “polytheists”, “breaking all rules of grammar”, and so on. Such commentators reveal their hand by their rhetoric; serious scholars don’t often talk in such terms.
JWs don’t enjoy much support for all their positions: such as on chronology, or in the past on the frequency of earthquakes, or further back, on the nature of the pyramids. JWs have never enjoyed support from experts on those topics and could rightly be held up for that. On the other hand, mainstream scholarly opinion agrees with JWs that the Trinity is not taught in the Bible, and many scholars agree that Jesus was viewed as an angel, God’s first creation, separate and distinct from God by the early Christians. That doesn’t prove JWs are correct but it is worth pointing out that senior scholars do support them on these issues.