Actually it's just the opposite.

But literally SPM.7 is the summary of the summary of the summary. There is so so much research published on precipitation, the vast majority of which is careful and precise in giving uncertainties.

It's also actually harder to attribute causality to long term trenda for individual current events than to look at model based predictions for the future. The entire extreme events due to climate change business is incredibly tricky to quantify, even though there are some good heuristic reasons to think it might hold.