Rather, "there is no evidence to show that using insecticide to kill mosquitoes inside aircraft cabins is effective in preventing introduction and spread of mosquito-borne diseases."

https://www.epa.gov/mosquitocontrol/aircraft-disinsection

Not sure where the idea came from that spraying the cabin aisle would penetrate the luggage bins, cargo hold, under the seats, or really anywhere.

1. Absence of evidence is not evidence of absence.

2. Risk is convex, so every risk increase by measures not taken is multiplicative, not additive.

The real question must be: does the disinfection do more harm than it provides reduction of risk.