I watch a documentary on Netflix called "Disneynature - Wings of Life". Hummingbirds, butterflies, and bees where all featured. These fliers pollinate flowers, making fruits happen. Wasps, where not featured. Then I came across this picture that are my exact thoughts.

Turns out that Wasps really do have a purpose. They kill other insects. This all makes total sense as wasps just look like finely tuned killers. Nature is crazy and wasps are no exception. Check out these videos.