Moreover, the entire concept of ownership is really just "you'll face violence from other people if you try to take that away, one way or another". That's it.

Universe doesn't care who owns what, those are just objects in space.

Sometimes this concept is helpful; you probably want the police to step in if someone breaks into your house (universe couldn't care less). Sometimes it's extremely dangerous, like when country leaders threaten others with nuclear war.

In either case, we should seriously revamp our relationships with land and property - that is for certain. Current ways are not sustainable and may lead to a disaster.