but they didn't price in the risk of technological innovation like AirBNB.
the corner stone in your logic (and in modern economy) is property rights. With my background (USSR), i'm used to think of property rights not of as something God given, instead as of something that was invented at some point and has been very useful so far in the development of our civilization. The property rights itself has evolved, from slavery societies to the modern day, from people as a property to ideas and RF spectrum being considered as property. The property rights will continue to evolve, and probably, God forbid - my townhouse is well over-water now, real estate rights disappear, while rights for DNA or human soul(mental footprint, dreams, etc..), something like this will come, or one day property rights, as exclusive license on something, will just stop being useful for human civilization at all.