At the end of the day, the data show what they show, and who funded their collection doesn't matter.
Then there is the money...... there is likely money to be made by crafting a chemical solution to the problem.
As a former beekeeper who suffered year after year the loss of seemingly healthy colonies, I know first hand the problem is not trivial. I spoke over the weekend with a fairly new bee keeper and she advised that the problem may have lessened slightly, but it is certainly still a challenge.