My impression reading the article was that the primary problem is affordability and AirBNB units competing for housing space. The remainder, about the problems of tourism in general, seem like a pro/con situation that has always been an issue in popular tourist destinations, and AirBNB is just the latest highly visible participant in it. It seems likely that AirBNB has helped make tourism more popular, but that trend was already going strong before AirBNB and probably would be without it as well.