I'd love to see the "data" in theology.
There's plenty of data. It just happens to come from a source that only theologians
Also, given how many confirmed predictions have been carried out based on "dark cosmology"...
Almost without exception, none of those confirmed predictions appear to bear close scrutiny. The observations are invariably tentative and are based on an assumption of the presence of dark matter in the first place, the absence of which would in almost every case suggest a different explanation for the observations.