To be fair when you live in a big city and you have to take the subway all the time, it just feels physically nice to remove the background noise whether it's the noise of the train itself or the musicians or the people asking loudly for money. I don't even have airpods, I have good old earplugs because I often too lazy to choose the soundtrack of my own life. It's not that don't want to talk to unknown people, it's…
I also often have them in while walking around the city for this purpose as well. I usually have the noise canceling off, but if an ambulance or something is coming my way, I quickly click the AirPod to put them into noise canceling mode.