On the flip side, we do know what will happen if the Aedes aegypti, Anopheles, etc... is allowed to continue to exist - 100s of thousands of people a year will die.
I wonder how the author would feel about keeping mosquitoes around "just in case", if hundreds of thousands of her neighbors were dying every year.
And guess what, if, for some very, very bizarre reason it turns out that Aedes aegypti/Anopheles was a super important species, there is zero difficulty in breeding and releasing billions of them back into the wild in very short order.