Having food readily available is almost something we don't even notice. If you've never gone camping, it is not even something you think about. I go to my fridge, or the cabinets and just reach out my hand and the food is there, wrapped nicely and clean.
It's actually a fight to keep it that way. We have an exterminator. I'm a vegetarian so there is no meat grease left anywhere, but my neighbor is a meat eater and if her dishes or stove are not spotless, not only does she have roaches, but they come over here, too. They don't last too long, though; anything that moves is of interest to the cats. They are the terminators here.
Then there are the ants. It is the rainy season now and there are lots of ants. I have to put the cat dishes on top of other dishes filled with water or the ants will take over.
In the big picture, there are many more insects than man. By myself in the apartment, I feel powerful, independent, and in control of my world. That is such an illusion. I am in the minority, and becoming careless, I'd be overrun with weeds, bugs and other creatures that want to survive. There's a Hindu saying: "we are food."