I live in a terrace. If someone is knocking on the door it's not easy to tell whether it is on our door or on one of the neighbours either side.
Nine times out of ten it is a delivery person.
They will knock on the door. I can't tell whose house it is. It is not our doorbell ringing. A few moments later they will ring the doorbell. I get there and they are grumpy for having waited.
Why not ring the fucking door bell?
It's even a ring doorbell, so I can tell you I'm on my way.
It's not in a hidden place. It's where a normal doorbell would be. It has a glowing light, so it is clearly working.
Why not press the bell !?!?
It happens all the time.