“You WANT your property manager to have a key - for too many reasons to list.”
I guess people of different definitions of privacy and security.
Put it this way - the first time some moron washes his hat in the sink and forgets it’s there - destroying all the units and chattel underneath - you and everyone else will be demanding a key rule.
That’s just one example.
There are cameras and trustworthy people. Nobody’s opening doors without need unless they like jail or worse.