2 there is no expert or science that can fully understand the whole ecosystem and how it works, mosquitos and many insects are at the base of the food chain, the impact will probably be a domino effect that will make many other species extinct, where will this lead? nobody knows, it's like playing with fire.
Wiping out entire species to solve the spread of a virus is not only inefficient (there are other ways it can spread) and dumb but also dangerous, it's like a solution of an infant that can only think destroy destroy.
We need creative and intelligent ideas for hard problems, not simple and stupid infant like ideas, and hn is a place where people with such ideas gather this is why you see more of these comments.