And suddenly your tourist-y locale is transformed into "just another cityscape."
Not to make light of the need for affordable housing. But, the problem with respect to AirBnB and the like is not simply to "build more."
Zoning, regulations, and such grew up over decades, in response to needs. Not "just because."
AirBnB and the like, as I've commented elsewhere, essentially crowd-source an "end run" around limited resources for enforcement.
Arbitraging short-term rental demand against limited, taxpayer-funded (and often not even supplemented by e.g. hotel taxes that traditional short-term rental establishments have to pay) enforcement.
In my personal experience, I have had an abusive level of disregard for the common welfare exhibited by a few neighbors. Absent effective control, it really can "ruin" a building or a neighborhood.
This has left me with exactly zero sympathy for the AirBnB crowd. Especially after the all-to-frequent horror stories I've read -- thought admittedly, the press and public attention seek the extremes for the sake of sensation. But even just in more level-headed, unpromoted comments here on HN and elsewhere. The "sharing" economy too often takes its advantage by dumping on its surroundings and reducing the quality of life for others.
By all means, build more housing. In a sustainable fashion and enjoyable design. I've advocated for creating regulation and code that requires noise-reducing materials and construction techniques in new construction. Among other things, this could well make shared dwellings more attractive, increasing density and resource efficiency while maintaining aspects of quality of life such as simply having a safely peaceful home.
But don't promote "build more" as a simple sop for the problems AirBnB and unregulated "sharing" bring to the table. Don't turn other people's homes, often against their will, into "the hotel room next door."