Technical Mastery is not Art, it's Technical Mastery. There's nothing inherently creative in having mastered a craft. Technical Mastery is a comparative metric when a given output has been determined to be artistic.

Producing a "selfie" is, by definition, working within an artistic constraint, and when I read your post I had to assume that we had already seen many "selfie artists", which seems to be the case:

http://www.huffingtonpost.com/entry/10-artists-who-use-selfi...

Certainly not:

https://en.wikipedia.org/wiki/File:Raffaello_Sanzio.jpg

No selfies in the canon here:

https://en.wikipedia.org/wiki/File:Kirchner_1919_portrait.jp...

Utterly unimaginable:

https://en.wikipedia.org/wiki/File:Muybridge_disk_step_walk....

Yeah not like we haven't seen "Portrait of the Artist as a Young Man" or anything a billion times.