If you really didn't want your photos to be analyzed, would you be using an iPhone? Or any modern smartphone? Google photos doesn't have nearly the privacy focus and no HE whatsoever but I rarely see that mentioned here. It almost seems like Apple gets held to a higher standard just because they have privacy preserving initiatives. Do you use a keyboard on your iphone? You may not have heard but apple is tracking which emojis you type most often [0] and they get sent to apple servers.
[0] https://www.apple.com/privacy/docs/Differential_Privacy_Over...