So the parent got flagged after I did the math. I hope you don't mind my posting it here just to qualify what the justification looks like:
The exaggerated use-case:
0.0000000001% is:
0.000000000001 (10^-12)
Multiplied by 1,460,000,000
----
0.00146 persons.
And we already know that there are at least 2 people (myself and parent up there) who are interested in that. This is off by a factor of 1000. I'm willing to guess that it's actually off by a factor of at least 1,000,000, possibly 10,000,000. It seems completely reasonable to me that we could find in the entire world of iPhone users 146,000 people who would want to setup their own photos backup.
All of this is simply to say that the user base is absolutely massive, and we need to appreciate how huge it is. Even a very very small subset of users represents a very large number of actual people.
