I think this is might be the key. The 'Your Music' section is not a representation of the full catalogue (confusing, I know - I never really use it for anything else than accessing my stored playlists) - it is the music you have liked/playlisted and so on - think of it as a kind of record collection and not the whole record store.
If you go to the artist page you will get the full overview (artist radio, biography, related artists, all releases and so on).
Yep, AM For You is based on listening habits, this is nothing new though - his type of functionality has been around since streaming services started getting traction around 2008 or so. Spotifys Discover Weekly does it way better than anything I have tried before. Just try it - it should be right there as a separate playlist along with your other saved playlists if you have Spotify.
Edit: Found a nice article on how Discover Weekly actually works:
You’ve been playing song A and song C a lot, but it turns out that when other people play those songs together in their playlists there’s a song B that you’ve never heard before.Discover Weekly gives you song B.
In other words it takes it a step beyond either manually curated or fully automated playlists based on your listening patterns. It is automated, but at the same time 'curated' by other Spotify users that listen to the same stuff as you. And it it not limited just to new releases or fenced in by genre definitions.
http://www.techinsider.io/inside-spotify-and-the-future-of-music-streaming
PS: I know I am harping on endlessly about this, but to me (and I have been a music fan since the 80s and have 2500+ physical albums in my attic) this is the largest and most important development when it comes to discovering music I have ever experienced.