Astronomers. This is no different than scientists in every community. Mind you I think science is a wonderful thing, I just don't think scientists are as scientific as they should be. Herd mentality rules.
o, I mean you actually tell me where you ever heard it said that it was an irrefutable fact that most stars were binary. Because frankly, it seems like you are merely making garbage up. Any time I've ever heard reference to binary star systems, I've always heard it purely as conjecture.