You notice that it is a big thing these days to create artificial intelligence in to androids/robots and whatever, well God did this when the world/universe was created.

Insects are robots made from biological matter, same as us, but insects have a very limited memory, very limited intelligence and thinking capacity, and they born with their intelligence, unlike humans who have to learn (it keeps us occupied).

Insects have jobs, some we may not even realise what they are yet, and they do them very well, but they are many, and they breed, thus they can create huge amounts and that needs controlling, so other insects and animals kill them and use them for food.

They are expendable. There are often so many of an insect species in an area that they can become a big nuisance, and that is why they need controlling to keep their insect numbers down.

The point is, not to treat them cruelly even though you know that they are expendable and each one not that important. Each one still feels pain, and suffers, so it is nice, compassionate to treat them with respect for what they have to do.

I take spiders out of my house, I don’t kill them. They have a job.