So, in summary, some moths create silk. The rest are simply dowdy butterflies without the elegant clothing who serve as chum for other flying creatures, which are most-likely equally worthless.
Let the Great Extermination begin, I say. Who needs ugly little cropdusting versions of the butterfly when we have the real thing?
Their role on the bottom of the food chain doesn't end at the larval stage, of course. As adults, mosquitoes serve as equally nutritious meals for birds, bats, and spiders.
As much as we loathe them, mosquitoes represent a considerable biomass of food for wildlife on the lower rungs of the food chain. Their extinction, were it even achievable, would have an enormous adverse affect on the entire ecosystem."