The average user might see a Siri-AI + Spotify integration as “I can ask Siri to make me a playlist”, while under the hood, Spotify would have access to _all_ of the user’s data and the ability to act upon installed apps. I can understand wanting to have better privacy controls in place before allowing that - will Apple do it is the question.
As far as the backup software, the analogy doesn’t hold for me: there’s an expectation that it will have access to your hard disk. There’s also an expectation that you can disconnect your internet and still back up your hard disk - can’t exfiltrate data if you’re offline.