>...that Grand Conspiracy Theories are a hard sell

I agree. It's as I say ... if you can't / don't / won't see it ... I can't explain it to you. I can try ... but in the end ... here we are.

>...In fact, your insistence that this particular GCT is so in the absence of
>evidence or reasoning may reasonably be taken as evidence for a lack
>of reasoning in reaching the conclusion.

That is definitely one possibility.