This is a complete FAILURE to enforce property rights. If by stealing your car, I automatically own it, that means there are no property rights whatsoever.
No it's not. You are assuming that the entry on the ledger is a person it's not. It's a thing. I can steal all sorts of things from you in real life and if you don't know I stole them, then they will be gone forever.
You are still not understanding what is meant by enforcing.
You are still not understanding what is meant by enforcing.