The value landlords provide is the assumption of risk. The premium you pay to rent is in exchange for vastly limiting your exposure to said risk.
This is why offloading the risk onto creditors (ie purchasing real estate with borrowed money under an LLC) is so lucrative. You reap all of the rewards of property ownership, but none of the downside. In a failure scenario your creditors are on the hook, not you.
I should probably add that banks are not stupid and it is very difficult, but not impossible, to get a loan for real estate investment under an LLC.