i love this because I build in medtech, but the big problem is no open weights, nor open data.
you can export your own apple XML data for usage and processing, but if you want to create an application and request apple XML data from users, that likely crosses into clinical research territory with data security policy requirements and de-identification needs.
They might not sell "your" data outright, but it doesn't mean they won't sell inferences/assumptions that they make about you using your data.
The reality is that no matter how ethical the company you trust with that data is, you're still one hack or pissed off employee away from having that data leaked, and all of that data is freely up for grabs to the state (whose 3 letter agencies are likely collecting it wholesale) and open to subpoena in a lawsuit.
If a corporation can make money hand over fist by doing something, they will do it. It doesn't matter if it's illegal or unethical. As long as it's still highly profitable it will be done.
you can export your own apple XML data for usage and processing, but if you want to create an application and request apple XML data from users, that likely crosses into clinical research territory with data security policy requirements and de-identification needs.