Your mistake is in thinking that representation in the media/web sphere = representation in the population. White I don’t know the numbers, I reckon that the percentage of the population that doesn’t want a headphone is less than half—possibly much less.
I get the school arcs because they’re a lot more relatable for the Japanese audience that is actually going through that experience.
Both perspectives are defensible. The question could be interpreted generally on its own, or in the context of OP’s new-user experience. Personally I would lean towards the latter, but that makes an assumption that the] look