Fair enough, it does happen. Relevant background: https://nationalmortgageprofessional.com/news/investors-hold-most-empty-houses

The states with the highest vacancy rates in investor-owned properties were:

Indiana (7.2%); 
Illinois (6.1%); 
Oklahoma (5.9%); 
Alabama (5.9%); and 
Ohio (5.8%). 

States with the lowest vacancy rates were:

New Hampshire (0.9%); 
Vermont (1%); 
Idaho (1.2%); 
Utah (1.5%); and 
North Dakota (1.5%).

I'd argue my sentiment remains, investors for the most part rent out property, they don't typically hold it vacant. When they do it's more likely vacancies are transitory (trying to find a renter) than long term and intentionally kept vacant.