It is nearly impossible to construct randomized control trials in Nutritional science and Psychology. Both are about average impact of specific things many entities, and even measurement itself is a nightmare (self reporting, placebo)
On the other hand, climate science has a control, which is climate measurements from all the years when humans were not polluting. Additionally, the measurements are actual mathematical levels of atmospheric properties or compound concentrations. The statistics here is a lot more solid. Philosophy, Anthropology and History are unfortunately not sciences in the rigorous sense.
Additionally, as looked down upon as anecdotes are, there are way too many of them to ignore. This year it has continued raining my home town into November. In my 25 years alive, it had never rained past Sept there. As much as anomalies do happen, these micro-level trends have only helped strengthen the case for climate change.
Sure, no science is ever settled. There is always a non-zero chance of even the most settled science being false. All of modern medicine can be bogus and homeopathy can be the real solution. Yes, there is a non-zero probability of that.
Skepticism is healthy, but when the odds of the contrary stance are so low, it helps to ask if deserves to be the level of questioning when the opposite stance offers almost zero evidence of the contrary. (apologies for weird sentence constructions. It sounded right in my head)