In my experience I think it usually comes from a mistaken idea that all fields of science are equally predictive, which I think comes from a popular misconcepti

In my experience I think it usually comes from a mistaken idea that all fields of science are equally predictive, which I think comes from a popular misconception that "science" = "physics". I think we colloquially get drawn into thinking that science-as-in-physics is the same thing as science-as-in-biology is the same thing as science-as-in-economics, especially when it comes to what they all mean by "fact" and "proven". Media then takes advantage of this general misunderstanding to make "weather facts" sound like they are just as concrete as "fundamental physics facts" because it gets more attention. Then we find ourselves arguing about climate science with the same level of self-assured veracity we might argue about billiard balls on an ideal surface in a vacuum.