If I was more cynical I would suggest that this is being used as an end-run around encryption, since the encryption doesn't have backdoors for the government but this gives you access to all the same data.
When this backdoor is inevitably exploited in some very public fashion, it won't be the EU regulators that required the backdoor to exist who will be blamed.
The way Apple Health exchanges data with 3rd-party trackers (Fitbit, Garmin, etc.) is very well built and a good model of how other components in iOS could allow data exchange with very granular permissions.
Apple touts the "Private Cloud Compute". If they found a way to share your personal context to process on their cloud in a private and anonymized way, there is no reason the same process couldn't be used to handoff data to a 3rd party AI provider.
One of the issues here is that there are many people with strong opinions that don't understand the thing they have strong opinions about. Which is the normal state of human affairs.
You want Apple to anonymize a users data, then hand that users data to a third party who knows who the user is? I don't think PCC is doing what you think it's doing.
Well then explain me this: There are absolutely no restriction on MacOS where I can give Claude free access to everything. If you are a Mac and iPhone user that essentially gives it access to the exact same data. Why is the data only protect worthy when accessed on the phone directly?
In exchange, it also less secure, less user friendly, and less popular.
This is the rhetoric used against right to repair. "What if enemies get access to our citizens' data if we allow anyone but us to repair your car?"
No. Only if you would consider the Linux/macos/windows filesystem API a backdoor too. On your desktop any app with sufficient permissions can read all your data. Would you call that a backdoor?
Is Apple incapable of designing a permissions system that allows a user to grant access to email and messages to an app of their choice?
We already download apps and grant them permissions to subsections of personal data on our devices.
I don’t believe Apple is incapable of designing a system that respects a user’s choices and granted permissions.