The same incentive exists for economic figures (inflation linked bonds) and market prices (cash settled derivatives), and it's seemingly not an issue, and those are far easier to game than physical measurements like wind speed or whatever.
I’m not so sure about that. I bet that we could tamper with an anemometer somewhere out in a field. Easiest is to put brushless motor with a propeller next to it and blow propwash on it. More technically difficult is to tamper with the signal between the sensor and the station, or MitM the station.
If you are careful and only modifying the measurments when the weather is already crummy they might not even suspect.
Sounds like you do see an issue after all. Is it obfuscated? Hidden in complexity? Is it artificial to appear as one thing while indirectly, as a side effect, leading to another?