Before the rise of the Chicago school approach to antitrust, government regularly took action to prevent monopolization. Oddly enough, the size of the world's largest corporations has been skyrocketing in that same period. So yes - we should be hypervigilant to hypothetical monopolies in every industry - especially when we have governments decidedly uninterested in preventing them.

https://en.wikipedia.org/wiki/United_States_antitrust_law#Ri...

Okay, you want to talk about monopoly. You don't want to talk about housing. Fine, whatever. But don't pretend your ideas have anything to do with actually helping the cause of affordable housing.