I mean, capital still exists even without capitalism. Houses are made with materials and labor that cost more than rent and a security deposit. Even in the most socialist or communist ownership structure, someone paid for those materials and that labor, and that someone isn't a new tenant unless they bought the entire house with an upfront payment.
I'm not sure what alternative you're proposing.
I sure would love to be given the capital of a house for free, because then I could turn around and reverse mortgage its value and get significant personal gain from that.