[rbanffy]

They can only recommend what they understand. I am not aware of any automated recommender that listens to music to make decisions on how to recommend it. For that, humans are still good.

[kleiba]

They don't have to listen to music - they just look at what people who like similar stuff to you, like in addition to that.

[rbanffy]

And that's why a human (or a model that can represent the music) can make better recommendations.