Literally every single little theory people have came up with has been debunked. The conspiracy movie comes out and a month later someone makes a movie debunking every single part of the conspiracy movie.
And let's say we found out it was a complete conspiracy? Please tell me what then? You gonna go round up and kill all of the people involved. This would be worse than it being a conspiracy and it being covered up. If you believe it's a conspiracy then fine, but no good would come from investigating further or making the government come out and admit that it was a horrible plot for money. It would cause a whole bunch of more problems. If it's about the truth, then that's fine. The truth is easy to find if you look for it and for those who don't then there is no point in forcing something to down there throats. If people wanna be stupid and believe whatever is fed to them then they can go ahead. Doesn't affect you.