A few memories.
As a college kid, I worked at a course and went out on the spray crew. One day, the super came out right as we got to the first green. While he made out a list and let us go, we found out he double checked everything we put in the tank by going through the trash or partly filled containers, just in case. In my case, from memory, I loaded Daconil SE instead of Daconil, not realizing there was a difference.
My first on my own project came as a result of a winter freeze in DFW that killed greens everywhere. Still, many members were convinced that their dead greens were a result of their super doing something wrong with the chemicals. As today, we can see strongly held convictions (our super is a bum, Trump won) are hard to change with simple evidence. In this case, if it was chemicals, why was every other course in the area also dead?
I also recall the USGA putting out a report on the number of greens that die each year, and it was a near constant 1% of all 17K courses. And, over 90% of those were related to severe regional weather. But, if you ask a typical golfer, he would probably reverse that ratio and blame the supers for 90%, weather 10%.
At least this letter came from the GM.