I get it. Doing activities while listening to music is more fun. Sneaking in a podcast while commuting is efficient. Immersing yourself in an audio book is a great escape.
But please, for the love of everyone that wants to stay safe, take out your headphones while riding a bike in the city.
I can't imagine the added danger of not hearing everything around you. Not wearing a helmet is dumb but only affects you, in theory, but being audibly elsewhere is wildly reckless.