I understand where you're coming from and can see the validity of that perspective. I just perceive Apple as a distributor role, and know the percentages distributors take. It doesn't make it "right" or anything, it merely justifies it for me.
I just have trouble with that definition.
They are only distributing the free app - just like in the cases of Uber/Lyft
The App isn't the product here - the content is.
That's exclusively hosted and licensed by Spotify