There's nothing in the developer section https://developer.apple.com/documentation/security https://developer.apple.com/documentation/security that specifies

There's nothing in the developer section https://developer.apple.com/documentation/security https://developer.apple.com/documentation/security that specifies this restriction. Maybe I couldn't find the reference. I'm pretty sure the Chrome folks removed it because they didn't think the Keychain was secure (at least from the readings I've done).