Based on the models John professes to beleive and to be the basis on the tech. that got him here, many of your reasons for disbelief, particular those just mentioned by James . . . are easily shot down or at least deflected.
If it is not the truth for John, it is atleast an ingeniously well constructed story.
Lets talk about those things John has been repetitiously asking to talk about . . . since, John’s being a TT may be his reality, but at the same time, never be part of one of us critique’s realities.