The labels and artists have already incurred the costs to produce the content, their costs do exist.
Apple built a service that wouldn't exist without the content. The content would still exist on other services without Apple though.
Apple built a service that wouldn't exist without the content. The content would still exist on other services without Apple though.
no one is arguing that their costs don't exist, but that they have nothing to lose to put it on. It's not like the artist will somehow have a lower cost by _not_ putting it up.
You have zero evidence of this. We don't know and may not know for a number of years whether Apple Music is more profitable for artists (or not) than competitor services.