This is simply not correct once you account for the fact that people do not like to be uprooted from the communities they're part of. We are simply not in a pos

This is simply not correct once you account for the fact that people do not like to be uprooted from the communities they're part of. We are simply not in a post-scarcity situation for housing, and YIMBYism is essentially correct. Homelessness is the most visible sign of a much larger systemic problem. For example, it's quite likely that many homes today are overcrowded, and people don't have as much space to live as they desire. This is bad! Not as bad as homelessness, but depending on the specifics still quite bad. The good news is that building vertically permits more private space per person, so we don't just have to accept things getting worse.