> I would completely agree with that, but for some reason it isn't as politically do-able as this rent control legislation was.
The reason is that landlords know exactly what rent control does.
Landlords know that the tenants with the strongest interest in local housing costs are the people who already live there and plan to continue to do so indefinitely. Rent control is a method of buying them off without actually solving the problem in general, so that overall rents and housing costs remain high but the subset of people most likely to be politically active in doing something to correct that gets a bribe to stop objecting while overall housing costs continue to rise faster than inflation.
What it is, then, is not a step on the road to a real solution, it's a roadblock preventing that from happening by weakening opposition to the status quo by just enough that no actually effective reforms can be enacted.