I think you're still missing the distinction between "all mosquitoes" and "harmful mosquitoes". I don't think anyone is serious about eliminating mosquitoes tha

I think you're still missing the distinction between "all mosquitoes" and "harmful mosquitoes". I don't think anyone is serious about eliminating mosquitoes that don't feed on humans at all, for instance. What's being proposed is more analogous to aliens eliminating particular types of lettuce because they have a lethal allergy. We would in fact be fine in this scenario, precisely because there are still other kinds of lettuce and other leafy greens. We might not like it, but we would be fine. I get the impression that the kinds of animals that eat mosquitoes are less picky, more in the "if it fits in my face, om nom nom" end of the spectrum.