That's a lovely technical solution! It will last right up until the CCP rubber-hoses[0] Apple with "add these hashes or stop selling iPhones in China".

Apple will cave. They've demonstrated the technology works. The CCP is paying attention. Look for this feature to be mandated across all phones soon. Pandora's box has been opened.

[0]: https://xkcd.com/538/ (this link comes up with terrifying frequency on HN)