I think I understand what you mean now, if it was an interface then it should be possible to use a separate but similar interface to access the output but here there is only one non-PITA way. Eg. If there was a competing galleries app on iOS it should be able to see all the photos. Is that roughly the thinking? Makes sense to me and thanks for taking the time to type that out.
I could be wrong but I don’t think it’s been 3 years, they just deleted an older comment of theirs.