This isn't even true were I live. Investors will buy new appartments and leave them empty and sell them a few years later. Renting them would decrease the value more than the income is. It's worse than you thought.
Reminds me of a comedian who said he likes the European way and started asking "where is the toilet?" in the US. People stared at him saying "In the bathroom".
Even then: don't tell me it's Monday on a Friday!