Mosquitos are just trying to save the planet by murdering as many humans as possible

Here's a Venn diagram:

O Humans getting killed by mosquitos

O Humans at fault for habitat destruction

All of our best data on the impact says that it really wouldn't matter. Sometimes a species is a linchpin for the ecosystem, and sometimes it isn't.

Sucks for mosquitoes, but there's a very real chance that we'll smallpox them, and the biggest concern will be our confidence that the virus we use doesn't impact other species unintentionally.

They're largely applying this technique to invasive species of mosquitoes, eg Aedes aegypti, which is a potent vector of disease and native of Africa that has spread worldwide only within the past 200 years

They also eat nectar and are pollinators of various plants.

There's no way we could simply remove a creature as numerous and widespread as mosquitoes without any consequences.

If we were to somehow magically remove mosquitos from existence in an instant, we'd better hope something fills their ecological niche quickly

Edit: when excluding malaria.

They manipulate the weather using space lasers from their fake hollow moon above our flat earth.

By distracting drivers into causing accidents? Statistically speaking... probably.