how does Art fall into the quality is subjective argument?
Nobody can decide for another if that other will or will not like something.
And 'source calling' can sometimes be damaging to artistic value as well.
Source calling is hyped as if it is a sin when a source is not named, yet there are artists who like to remain anonimous. And who even don't like if the name of a commercial entity is 'called' where someone found a COPY (image) of the artwork.
Even though they are perfectly OK with having pictures taken and published, but they HATE to be associated with commercial entities. And those who know those artists will respect that and NOT call a bogus source as the ACTUAL source could be "South wall of Buckingham palace" So if the source is then called I found this image on 'shittycommercialwebsite.poop' That then disrespects the artist. Would that artist be respected if he or she anonymously filed a take down notice?