The argument that the government wouldn't be able to cover something like that up is kind of weak imo. They had just spent years keeping the Manhattan project under wraps and they were starting to ramp up all sorts of spying and secrets surrounding the Cold War. And for info that does get out(like numerous eye witnesses), we've seen real life examples of how effective the strategy of treating believers like they're nuts is when it comes to other government programs like PRISM. People talked about NSA spying for years but got dismissed until we got some big document dumps.