This is an interesting statement; could you clarify what you mean? Taken at face value it seems like a falsism, but I'm assuming you have an interpretation in mind that would make sense to me.
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1. Yes it’s now just called “Music” but because “Apple Music” (intentionally, I think) confusingly refers to both the streaming service and the app I use to manage my digital music collection and because damnit, I’m the kind of old person from Chicago who still calls it the Sears Tower/Standard Oil Building/Northwestern Station/Comiskey/etc., I’m gonna still call it iTunes.
I hear the same argument a lot when it comes to game emulation. People will say you shouldn't put full ROM sets on your device because it makes it harder to decide what to play and to stick to a game. Compare that to browsing the 30 GameCube games you have in a cupboard from 20 years ago. You can kinda recreate that digitally by only putting a select amount of games on your device at a time and trying to spend more time per game. This particularly comes up when discussing emulation on handhelds.
Bringing the conversation back to music, while I do prefer digital, I've got albums in FLAC on my phone and I re-listen to the same 50 or so albums a lot, only occasionally adding/removing from what's on there.
On curation, taking one's time to do that oneself is arguably superior. You get to know your music better, tailor the collection to your tastes, discovery and growth is active not passive.
If you're really into a band or genre you'll also run into the limits of Spotify's collection. Artists have missing albums, some artists aren't there at all. It's not as bad as film and TV, where six subs are required to cover a broad range of viewing, but that's the enshittification pathway.
Also, real music people hate the mainstream, man.