They are only too willing to explain that uniform, objective rental requirements are just fine. The biggest reason that landlords rent to bad tenants is that they haven't figured out just who a good tenant is. To figure that out you need to create those uniform, objective rental requirements that the Fair Housing enforcers allow are okay. When a bad tenant is living in a unit, you can't put a good tenant in it, the space is used up until the bad tenant is booted out. Better no tenant than a bad tenant.
Tenant selection is the most important job a landlord can do.