I live near an intersection, and the most annoying noise is honking. Why do driver have to honk so much is beyond me. Also quite annoying is ambulance/police. They are really loud.
Honking is basically the only real way drivers have to communicate with the world outside their car. When a honk is needed to say anything you have to use it for everything. (The contrast is particularly stark against e.g. cycling where you can just match pace with a stranger and hold a brief conversation about whatever happened.)
For one thing, everyone in other cars have their ACs and music on and cannot hear the honking anyways. So you’re not communicating with them anyways. And if you’re honking at pedestrians in a first world country you’re driving wrong.