It might be hard to understand if you've not grown up in America, but homeownership is considered a part of adult life, of demonstrating you're seriousness and a gateway to adult life. This is sort of changing recently, but only because many millennials are straddled with student debt and jobs that won't pay enough to afford the down payment.
But every single American friend I have either has a home, or dreams of home ownership in the suburbs. And it makes sense, if I grew up in a home with a yard, I would probably want something similar for my children too. That kind of emotional connection is hard to overcome.