It's possible that while AirBnB increased demand for housing, the market could have responded by building and allocating more real estate to housing, resulting in an equilibrium. So it is at least plausible to me that an implosion of AirBnB might be good for renters in the short term as there is an over-allocation of housing, but that without AirBnB, market rates will increase to about where they were before as supply drops over time in response. The whole thing is complicated enough that there's no way I'm going to trust any single, non-academic article on the subject.