Which is why any correspondence we use is footnoted as such, and filed with the Foundation. You don't have to know the background to be able to tell that when we have a footnote saying "correction from subject, filed at X", there is probably a reason why it doesn't correspond to the public record...
But then, the source the actually WMF, and WMF is not a reliable source. Why should anyone trust some random person on OTRS to have correctly interpreted the email and copied the information across without making any typos, etc? The whole point of citing sources is so readers can go and check for themselves to confirm it's right - citing a private source is pretty much useless because it's really just saying "I know I'm right, just trust me on it." Just because I'm the foundation doesn't make me trustworthy.