1, moral: It is a figurative or metaphorical statement, which means that an individual's love and pursuit of music or sound exceeds his concern for the outside world, and that he prefers to immerse himself in his own music world with headphones instead of focusing on the noise or environment outside.
2. Literally: Headphones instead of hats means that people wear headphones instead of traditional hats when they are outdoors or going out, which means that individuals pay more attention to listening to music and enjoying media content, while the demand for daily outdoor equipment hats is low.