If it was possible to steal an apartment in the same way that you could steal a purse, then that is what thiefs would be doing because that is were the big bucks would be. People would be spending their time protecting their apartment, and society as a whole would not function well. Therefore, for the big things, it is important that society agrees about who owns what.
Blockchain for non-techies: 1. Agreement
William Rode
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I remember this being an example used in my government class in highschool. Specifically about how weak property rights enforcement causes social/economic breakdown in Nigeria because in some places people have to stay at home in order to maintain control.