Because this theme is enduring and will never be eliminated no matter what era, and secondly, most people in the world are very hypocritical, so this kind of music is more likely to be popular.

If it is positioned as pop music, then the content must be known to the public. Everyone knows about love. There is no need for hard publicity, and everyone can interpret it in their own way.

There are too many people who cannot love, so there are so many love songs.