I am a Conspiracy Theorist. Why, you may ask? Because I don't have the resources at hand to prove the Theories which I believe in to be fact.
You see, there's a burden of proof necessary to go from theorist to historian. And there is a status quo that is there to protect and defend the secret particulars involved in many of those 'theories.' And then there is the 'need to believe' 'credible sources' (i.e. tis better to suffer the slings and arrows of acceptable sorrow and public relations, than to question something you ain't gonna get away from too easily). In other words, it's easier to accept and 'go along to get along' than it is to be seen as being outside the mainstream. Hence, the shaming of 'Conspiracy Theorist.'
The burden of proof is often too great in the shadow of forces with heavily vested interests in maintaining the secrecy of the agenda and it's particulars. The Individual cannot withstand the onslaught of the Corporation and the Shadow with Money and Influence. Sunshine is often dimmed by the clouds that one can barely see in the heavens. Take that to the next level when it comes to 'National (and 'mythological') Secrets, and well... Let's just induct the old Bondian phrase of 'I could tell you but then I'd have to kill you' level of Secrecy, and...
Well, you get what I mean. 'We can disappear you wholesale' (to misquote again). What you can't see will definitely hurt you. Secrets and Lies, and Black Budget [items]! Oh, My!
[Pay no Attention to] The Man Behind the Curtain may eventually be dis-curtained, but in the meantime, it can be dangerous to know too much (especially if you have proof but no major backup to save you from an 'accidental' occurrence).