You could be right, I do have an inquiring mind.
One of the main problems with mossies, apart from them wanting blood, is they transfer disease.
It must be very difficult to deal with, and my thoughts were also on how many other insects or wildlife are affected.
In the link you provided, under #3 "What is larvaciding":
Chemicals used vary from specialized pesticides to insect growth regulators (IGRs) to environmentally friendly bacteria-based biological larvicides.
The environmentally friendly bacteria-based biological larvicides must kill off other larvae.
We don't have many mossies, but they are here. My water barrel which takes water from a shed roof is a breeding place for them, I guess the hole which the pipe goes into it could be sealed but as they aren't a huge problem at least they will be food for some birds. I've seen eggs in my pond, and in other places where small amounts of water has stood.