> That's possible in physics, chemistry, or biology just as well.
Yet it seems to happen far less often, or at the very least, in less publicly impacting ways. Part of this is the media, but part of it is the participants themselves. If you discover something new in physics for example, either the public doesn't care, or they don't really know, they just get a faster iPhone processor a couple years down the line when the predictions hold. The folks in your field are even skeptical at first glance, "do you have a 6 sigma result?". "Ok, well, lets talk then, but I still wanna see it reproduced". Psychology on the other hand, some person does a half assed 'study' and uses it to claim knowledge of some important aspect of humanity.
I'd really encourage looking at the Higgs discovery press conference as a perfect example. To my recollection, there was little to no mentioned of the Higgs, just cold hard facts, perhaps at the end there was a 'this is consistent with the Higgs'. Only months later were many of those involved even comfortable enough with their level of certainty to really say 'this is the Higgs'. They are searching out knowledge, and don't want to declare having found it unless they are certain. This is _good_, it's what we want science to be, the summation of our current, highly confident, view of the world. We don't want 'science' to encompass all untested and unproven hypothesis about the world.
The difficult point which I have to concede is that terminology is important. Certainly many folks in physics that maybe haven't hit on a predictive result would like to be recognized as scientists, and rightly so if they are on the path toward this endeavor. But the populous is simple, they want clearly defined words, they want 'science' to be known fact. Outside introducing new words, I don't know how to resolve this. If we don't define 'science' as denoting that which is rigorous, then we can't use "science denier" as a term, regardless of the topic.