I live in Seattle, and this is a scapegoat. it's another way to point a finger at anything but massive restrictions on supply. The easiest solution to collusion to keep prices high is to let lots of other people build and compete down price. In Washington, most new construction happens on a very small number of parcels, because that's the only place we allow it.
Nobody concerned about rent price fixing thinks that we don't also need to build more housing here. This is just another part of the problem. Are you defending the practice?