Wow those are great. I have always been a fan of Sherman and this latest digital work is the best digital work I have seen. I guess if you don't get it, you don't get it.
Exacly - you metioned it. The first possible case is : People like it , the other case is : They don't like it.
So we all might remember the folowing : The task of Art have never been to create what People mostly like. If you reduce Art in that way you get a nice definition of what (in most cases) isn't Art.
Sure there must be a way of Art from what most People like. Because the opposite from that isn't also a Definition.
To think :"That is most ugly so it MUST BE Art " isn't a right way too.

....
To come to a definition of Art from interpretation is a possible way - but (sorry to say) that is also no way.
Art is mostly that what People feel as Art. For me the discussed selfies are Art for sure but it does nothing to say to me - but that must be no problem.
Others (so as here) feel the opposite. This selfies told them EVERYTHING !
Quite clear is the interpretation of Cindy for her it has a lot to say. But to her this LOOK is possible total different to each single Interpretation of all others. That is Art !
with regards