If there were no landlords, it would be impossible to start a business in NYC without buying a building. Most businesses would never be able to afford that. Thank goodness there are landlords who are willing to rent out their buildings!
Private ownership and rent contracts is only one way of many to solve the problem of granting access to space without outright purchase.
Also, providing a service and extracting value from others work aren't mutually exclusive. Consider this: a foreign organization extracts natural resources, refines them, sells the new product back to the localsy (and other outside communities) for large profits that are mostly redirected outside of the native community.
I would clearly call that extraction, the fact that they also provide a service to the community doesn't negate that.