it’s tough for people to take how things work on a micro scale (e.g. family or friend-group dynamics), and apply that thinking at larger scales.
Because it’s already very very hard to scale. It takes only a small group of people to fuck up trust models to such a degree that the whole system falls apart.
If you are not prepared for evil, evil will hold far more power that you and decimate the entire community. Indigenous peoples from every corner of the world have been punished by that hard lesson over and over again.