This is not a binary situation. There are plenty of reasonable approaches that help limit abusive landlord behavior without damaging the prospect of profitable real estate development.
But where I'm not going to agree is the notion that setting rent above a certain threshold is "abusive landlord behavior". If a landlord is setting the rent too high, the consequence should be that the unit stays vacant. If someone is willing to pay that rent, then evidently the rent wasn't too high.
This can led to situations where the most profitable move for landlords is to take advantage of the discrepancy to regularly raise the rent for existing renters by more than the market, in attempt to maximize profit. Sure they might have to deal with the hassle of finding a new tenant every couple of years when someone gets priced out, but if it leads overall to slightly higher profits it's the winning capitalist move.
The rentiers are ostensibly following the law, but the overall cost to the population and quality of life loss to renters can be significantly outsized compared to a sliver of additional profit for the rentiers. This is a great example of externalized costs in a free market and exactly where government should generally be attempting sensible regulation.