I'm confused about the confusion, really. It's not hard to imagine how "tech company compressing all your traditional art tools into a blackbox" imagery would have struck some nerves that were already rubbed raw by the AI-Art Discourse.
It's not just general sensibilities, it's comically topical.
Yeah, imagine telling a guitar or piano player that they can trash their respective instruments, because "all they need now is an iPad". Doesn't sound good, does it?
Apple is essentially saying 'Don't worry about learning to play an instrument, use an iPad instead!' which is just disgusting. The modern world has lost too much dicipline and creativity already. It doesnt need more people being encouraged to take the lazy option.