You have done an excellent analysis, thorough and of great culture.
As for interpreting or referring to a work of art, I agree with you.
New works can be created, but they must have a different substance that is conceptually revolutionary, as Wharol did. Many great artists have a cultural background that allows them to take models and distort them from their social, political and natural context.
I only speak of those who copy and do exercises using photographs of other artists, not free.
Great comment and a hug full of hope @richardfyates
Armando