In Spotify when you create a new playlist it offers suggestions of songs to add. I assume it’s using some algorithm based off the the playlist title. Also as you add songs more/different suggestions pop up. Pandora is like this too. Why can’t Apple Music do this? One it saves a lot of time and two sometimes it suggests a song you might not have been thinking about but it’s a song you’d want to add. If Spotify can do this Apple certainly should be able to.