Many people cants get a mortgage as they cannot afford a down payment and/or they are too much of a credit risk for the bank. So they cannot buy a house. A landlord buys the house using their own down payment and assumes the risk and then provides an arrangement where people who otherwise could not get somewhere to live, now can rent on a monthly basis. Without the landlord, people who could not buy a place to live in would have to live on the streets. So the landlord plays an important roll unless you’re ok with poorer people having to live on the streets.
You’ve yet to explain how that’s an important role.
Many people cants get a mortgage as they cannot afford a down payment and/or they are too much of a credit risk for the bank. So they cannot buy a house. A landlord buys the house using their own down payment and assumes the risk and then provides an arrangement where people who otherwise could not get somewhere to live, now can rent on a monthly basis. Without the landlord, people who could not buy a place to live in would have to live on the streets. So the landlord plays an important roll unless you’re ok with poorer people having to live on the streets.