with a piece of popular music you get a single ethos, a single feeling,a single mood associated with the piece, and the piece will tend to be shorter.

在流行乐里，一首歌只表达一个中心思想，一种感觉，一种情绪，所以这首作品也就会短小一些。

耶鲁公开课 - 聆听音乐课程节选

Because it will allow you to express strong feelings about not liking something or not wanting something.

因为它能帮助你表达一种厌恶或不想做某事的强烈情绪。

I hate 课堂 - SpeakingMax英语口语达人

I hate expresses a strong feeling.

hate 表达了一种强烈的情绪。

I hate 课堂 - SpeakingMax英语口语达人