system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does our brains treat boredom as an undesirable state?

Considering that, in nature, not having anything to worry about and having all necessities fulfilled seems like a good thing, why are we wired to think that boredom is bad?
gpt
It seems like not having anything to worry about is good, and objectively it is, but our brains evolved in a situation where that was simply never possible.

Between threats of predators, other people, the time between meals, the growing of crops, the creation of shelter, the building of fire, the dangers of fire, the finding of water, making sure the water is good to drink, and so on and so forth, our brains just need to be active and alert.

And the less there is to stimulate us, even if it is just some bright flashing lights and pleasant sounds, the more our brains will look for some stimulation.

Even when we sleep, parts of our brain remain active, listening for intruders, seeing if the sun is up, and considering what happened in the day.

It is a paranoid and ever vigilant organ, by design.