Humans have an awful record of shortsightedness and unforeseen consequences. While yes, mosquitoes have the highest humam kill rate of any other thing that can kill people, it can be mitigated or eliminated with adequate sanitation and healthcare access for communities being harassed by mosquitoes.

The better solution to the ails caused by these insects is to improve drainage and sanitation infrastructure, build hospitals and clinics, and enact policy which gives access to this infrastructure to everyone without exception.