This is one of those interesting lines of argument where you position yourself so that you can't possibly be proven wrong.
No one can prove you wrong when you claim that anyone with knowledge from the other side should be immediately discredited.
You mention sources, but if you discredit the first-party source out of the gate, what sources are even left?
Documents from the bank created by the people you discredit?
(I take no position either way, I'm just commenting because your comment amuses me.)
I have been working there. I don't work there anymore.
But I doubt that whatever I say could change your opinion, you seem to have your mind already made up.