Well Ray, I do not agree (never have) that cropping could help every photograph. My comment was intended to give the message that cropping would not change that fact that it is a document of someone else'd art work.
Firstly, why should I want to change the fact that it is a document of someone elses art work. Things are what they are, whether it's a tree, a house, a waterfall or the Sydney Opera House. I don't see how cropping can change such facts. Of course, you can crop things entirely out of an image. You can crop things in such a way that they become unrecognisable, in which case you're getting into abstract photography.
Secondly, the shot is not just a document of someone elses art work. It's also a document of 800 years of weathering, erosion and more recent restoration and cleaning. The oriiginal carving would have been painted in ochre, black and gold against a background of white stucco, so in a sense this is a very poor document of the original finished art work.