In what sense are landlords "providing" housing? Is there an argument around like, stabilizing a demand floor for new construction or something, or is this one of those weird in-group terms that cover over what might otherwise be seen as a relationship of power or dominance?

Either way, if I rent out my house and pull in $5k/mo but spend $2k/mo on principal, $2k/mo on interest, and $1.5k/mo on miscellaneous costs, that $500 "loss" translates into me paying $500 for $2k in principal value, all while gaining the benefits of solid inflation-indexed real estate growth AND assistance up the amortization schedule. So even cash-flow negative rentals are usually pretty long-run lucrative.