Which is no doubt very true. But this still may be an argument for keeping Airbnb in the bigger picture if you value diversity in your neighborhoods. Any by diversity I mean the ability for many low to mid wage workers to live near their jobs.
The risk is that it prices the low to mid wage workers out with AirBNB not even keeping them in an area. I'd love to see a study on the average income of AirBNB hosts outside of their AirBNB income.