Bollocks. Cities like Amsterdam and Barcelona are historically constricted by nature. Not everybody is born with wealthy parents, a home to inherit or a job that will pay for one. Those cities won't grow much bigger than they are, nor should they. And those that are born there have more right to live there than tourists have to monopolize the space. The only thing AirBnB does is to line their own pockets at the expense of the locals. Hotels were a thing long before AirBnB turned social housing and regular apartments into a source of income for those wealthy enough to buy up the property. It's un-ethical.

Libertarian bullshit and 'the market' have done enough damage. See also: commercial healthcare.