The problem is that this is a too rational theory. Not enough of a conspiracy (these people prefer to think it was released on purpose to control global population etc). The other end of the spectrum the rationalists and scientists fear that they may go down a slippery conspiracy slope so they dismiss it the first moment another fellow scientist says so. Then the politicians don't want this hot potato in their hands, it could cause global wars economic or otherwise and half the planet resenting the other.