You might be throwing out the baby with the bathwater. Science, as a method, works. Science, as a field, has areas where it doesn't work very well. Diet, in particular, is probably one of the worst. The good thing with Science, the method, is that it is predicated on improvement by iteration. Dietology itself is getting a bit better (though there's a lot more to do), so unfortunately, until we find a better method, we have to work on human time. No need to discard every reasonable scientist's work just because of some (many?) bad apples. They are nowhere near the majority.