There was a recent thread about this.
As a thought experiment, if you were to lift a helicopter by the blade tips, would you be surprised if the blades were damaged?
In flight, the spinning of the blades causes the rotor disc to remain rigid, and whilst moving, the blades can withstand forces that would otherwise cause them to break.
Aircraft propellers are smaller and more rigid, but will be protected by their rotation in much the same manner. I would play safe and pull props by the hub.