Re: the specific argument about a coverup being impossible, there have been plenty of people over the years with claims like this. The idea that this guy is talking about what "a friend of a friend" said is also a very ungenerous and inaccurate claim, given the Grush's established credentials.

Otherwise, I agree it's hard to believe, but I don't think this guy has actually "debunked" it as he claims in his hashtag. The options are that he's lying or crazy, and he doesn't seem crazy, and if he's lying he's going to jail. The most plausible explanation for it not being true is that it's part of some complex psy-op, but that also is a fairly outlandish theory (albeit not as difficult to accept on its face).

I first saw the story pop up in r/UFOs, which isn't a great start. Granted, the story is well sourced by conspiracy theory standards but still doesn't quite raise to the standards of "extraordinary claims require extraordinary evidence." I put a mental pin on the story to see how it develops.

The whistleblower is real, the technology from outer space is not