Save a hand full of people while potentially dooming billions? I might not be getting your sarcasm but I'm totally okay with the current situation when the other presents the possibility of destroying millions of ecosystems which mind you would effect billions to trillions of animals, insects, and even people across the globe who are dependent on these functioning ecosystems. Killing off the primary source of food for a few insects/animals can have cataclysmic effect.

In addition Mosquitoes do serve a purpose outside of being food. They introduce many diseases, much of which we developed immunities to and continue to successfully ward off naturally to this day. They are the worlds natural vaccination shot so to speak.

Truthfully the idea of killing off all mosquitoes seems so damn absurd I don't understand why anyone thinks it's a good idea.