Makes me think of the four pests campaign. https://en.m.wikipedia.org/wiki/Four_Pests_Campaign
We know that kills far more than mosquitoes.
What i was using this example for, however, was the unpredictability of influencing an infinitely interconnected and complex system. In the case of the four pests, the influence was crude and especially myopic, so it makes for a wonderful example.
It is rare that the influence ends where we imagine it would. There are many possibilities for race conditions which i know i can’t even imagine.