Ruby doesn't have properties except as an alias for a certain pattern of methods, and in languages that do have properties they are almost invariably just a layer over calling getter and setter methods.
You seem to confusing “properties” with “data members” which, it is true, Ruby does not permit external access to except via method calls. But properties are a way of calling methods with a syntax that looks like direct member access, not actual direct member access.
You seem to confusing “properties” with “data members” which, it is true, Ruby does not permit external access to except via method calls. But properties are a way of calling methods with a syntax that looks like direct member access, not actual direct member access.