Well Apple Music didn't start with human curation. It started with the magic "next song" algorithm from the original Beats. [1] ( Which I am still pissed off about ). Basically the whole Apple Music, still as it is today is designed around Discovery. ( Edit: You can tell by its UI design evolution over the years, how it subtly changes. No Bookmark artist button, no back button.. etc ) Whether it was the original "Next Song", or curated playlist, or Beats Radio. Apple wants people to discover
new music. ( Which is actually a noble Goal ) The problem is large percentage of people dont discover Music on Apple Music, it was mostly though other media, offline playing ( where Shazam comes in ) or people just want to listen to
old music. In that what people want is a Distribution Point.
For English Speaking Countries Apple Music seems to be doing OK for that curation and Discovery. Especially in US. Elsewhere the same formula hasn't worked at all. [2]
Consider Apple has 1 Billion iPhone users, compared to 2.5B Android ( Excluding China ), with App Spending power 4 times the average of Android users. And Apple Music, after 5 years, with it being default on iOS ecosystem, still does not have half the paying users as Spotify is saying something.
That is not to say Spotify is perfect ( Far from it ).
Note: But it didn't matter much because Music Streaming Services is a Net Zero Profit Margin Business.
[1] https://www.cnet.com/news/beats-curated-music-service-headin...
[2] https://atadistance.net/2018/02/04/homepod-and-the-apple-mus...