"I know people"- the mantra of the anecdotal evidence.

I am describing a natural economic process and didn't say you don't know people. I am saying there are larger market forces beyond an individual decision and that your original comment didn't speak to that.

If you multiply your known landlords by a million do you think there hasn't been a decrease in willingness to expand rental operations.

It is hard to think conceptually so take your time if you need to.

Edit: Hell even in your response you almost get it. "They don't sell ALL their stocks". Exactly. All landlords aren't gonna sell all houses