Sadly, there's a strange knock-on effect of all the professional landlords: Instead of aspiring to own a family home, a lot of millennials aspire to become landlords, either by buying big and renting part of the space, or by buying small and using it as a springboard to buy bigger and rent the original place. It's a vicious cycle, especially since they often don't have the capital to easily absorb damage or maintenance costs, leading to the properties deteriorating rapidly.
It boggles my mind how people spin the stories to protect professional landlords, a class that does nothing but extracts productivity.