> In the past, before radio and recorded music, people daydreamed or sang to accomplish the same goal.

Call it pain avoidance or dopamine stacking, they're probably both apt, but there's a difference in degree between the level of control and personalization and dependence between humming a tune or listening to a stationary giant radio and the current state of not being able to do anything remotely unstimulating or arduous like standing on a train or going to sleep without a distraction; how normal it is seems like logical fallacy, It's also pretty normal for people to spend 5 hours a day looking at their phones, not have made any friends in adulthood outside school, or have any romantic prospects.

I find it funny/depressing that I've been asked at least 3 times why I don't wear headphones at the gym. If you can pull a lever or click a button and take your mind of something you've never let become less painful, how important is the distinction?