Earlier quoted context omitted.
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If we had the kind of legal system you want (where arguments like the one you just gave sometimes prevailed in court) nothing would ever get done because arguments about who owns what and who owes who (and how much) would abound and go on forever.
Note that half of this country was settled this way.
The alternative that is the current status quo is real estate corporations in New York and Delaware disrupting community fabric 200, 500, 1000 miles away in the name of quarterly profits. Legality is not the measure of morality.