I’ve been a landlord and I know how it works. The liquidity problem you mention is real, but so is rent seeking. Landlords may help make housing available, but they absolutely do not help make it affordable. Quite the opposite.

Think about payday loans services. They help make money more available, but they make it as expensive as they can. No one believes they are providing a valued service.

It’s possible to offer loans and rental housing at really reasonable rates, but that’s not what we have in our society. Investors and the wealthy buy up all the property, creating scarcity, this causes a price bubble which shuts out many buyers who get priced out. Then the renting begins, and I don’t know what it’s like where you live, but I couldn’t afford to rent the house I own.