I'm obviously projecting many of my own assumptions onto the movement, but willing to try to accept new information and reevaluate my position on it.
I still feel like it's at the nexus of some kind of misunderstanding of how property ownership works and some kind of hacking-the-system idealism. But maybe it'll come up with some good ideas.
I actually understand the micro-apartment movement more, because you're getting the convenience of city living along with it, and high density zoning, except that movement is also broken in ways that micro-apartments end up costing as much or more than regular old places.
Also, just as an FYI, the American style 30-year mortgage has been around since the 1930s as a response to the Great Depression and were designed to make housing more accessible.