The problem is, if everyone owns everything, the situation will automatically give rise to a group of people who will determine who appropriates what.

This is because conflicts will arise about who gets to use a particular resource and how it is valued, which will require mediators to resolve them.

That will end up creating a ruling class and a ruled class built on a coercive relationship.

Instead, if property rights are respected and upheld, if people engage in subjective valuations, it will give rise to a price system based on which voluntary exchange can occur.

It will be a lot more peaceful and actually workable.