TR, see the following
1. Economics is not science
2. No scientist claims that science is infallible. That’s why models are constantly tested.
3. Scientists, being human after all, are just as prone to bad behavior as you or me. I’m reminded of R’ Noach Weinberg ZTL’s famous warning about not judging Judaism by actions of some Jews.
4. Actually, weather prediction is pretty accurate given the enormous number of variables in the model. 3 day forecasts are usually right on the money. Longer range forecasts are much more difficult,
P,S, A general note: When a scientist refers to a “theory”, he (or she) doesn’t mean what you mean when you use the same word. Lay people use the word “theory” to mean sort of a best guess. In science the word for that is “hypothesis”. A scientific “theory” is an explanation of a phenomenon that has passed all tests of it’s validity so far. If it continues to correctly explain and predict the phenomenon for all possible tests, it becomes a “law”.