Fruit flies...
...will find a suitable chunk of rotting fruit from miles away. You're dealing with immigrants, not natives.
A lot of the rest of the list is called "living on planet Earth."
What I can't see and isn't toxic, doesn't bother me. Radiation would take care of many of these things, but gamma rays apparently make people more squeamish than live bug eggs.
They wanted organic non-pesticide food, such as our ancestors ate for countless generations, now they got it. Means you get a wormy apple now and then. But then, I come from a long line of farm people.