The article discusses this aspect:
But driving deregulation as well is the fact that private equity funds see great possibilities in your neighborhood. Your landlord is now much less likely to be a family or an individual who has owned one or two buildings for years, depending on them for a safe and steady income, and much more likely to be a faceless, massively financed international firm that is highly incentivized to force you out on the street and keep its investors happy.
It’s important to make that distinction. A landlord with one or two buildings may or may not get greedy but understands the value of a good tenant vs. a bad tenant or an absent or transient one. A large corporate landlord, especially one going for a semi-monopoly position, is all about greed.