Seems like a bit reductionist to liken concern/acknowledgement that "free market" dynamics may not necessarily be desirable in every case to support for Soviet-style regulation.
Airbnb has caused increase in local rent by removing the available to-let properties from the market in London. Considering that there is already an increasing wealth-gap problem, it's hard to stomach something that is exacerbating the problem and reducing social-mobility in the name of free-market dynamics.
Highly desirable places also have many second-homes as well. In Hawaii, some neighborhoods are only 20% occupied because most of the owners actually live somewhere else.
I am sure second-homes also drive up prices (In Vancouver they even have a special tax for empty houses).
Making generalizations about HN like this without backing data to support it is unwarranted. There are plenty of diverse views, many of which do not fit nicely in the box you've constructed.
