Because at least half of the people wouldn't believe them and consider this another conspiracy theory. Even when Bloomberg pushed this there are still so many deniers in this thread.
Hell, how many conspiracy theory's have come out as true in since 2001.
Remember the "The telephone companies are routing all our calls and internet data to the NSA" conspiracy.
A bunch of people said that was fake, and there was no way this could happen.
Then more evidence came out, and the same people said there was no way that could happen, its too big of conspiracy and it would have leaked way before then.
Then the government gave the telco's retroactive immunity for spying on the public.
Remember the "The telephone companies are routing all our calls and internet data to the NSA" conspiracy.
A bunch of people said that was fake, and there was no way this could happen.
Then more evidence came out, and the same people said there was no way that could happen, its too big of conspiracy and it would have leaked way before then.
Then the government gave the telco's retroactive immunity for spying on the public.