This has a ring of the same arguments made by flat Earthers. You could offer to take one to near space and show them things, but then every other one will stop believing that one person, so you're expected that unless you can take all of them to near space, you can't "prove" what you're trying to prove.

Your argument isn't far off from saying that Apple will collude with lots of security researchers, and because you're not invited to the party, nobody can prove that you're wrong. Oversimplification, yes, but basically true.