What are the obligations of the person managing the property and interacting with renters? Do they have a fiduciary duty to maximize profit? Do they have any to

What are the obligations of the person managing the property and interacting with renters? Do they have a fiduciary duty to maximize profit? Do they have any to the wellbeing of the renter so long as they don't run afoul of the law? I realize that an individual absentee landlord is also free to act like a jerk, but I suspect this puts actual pressure on them to do so.