It has more to do with the fact that most humans are social and cultural mimics, and genuine creativity is rare - and not always welcome when it appears.
Could it have anything to do with the sheer volume and accessibility of 'art' in the modern world? There was a time where thousands of people had to favor an artist/photographer's style in order for them to rise to prominence. Nowadays with people scrolling through hundreds or thousands of Instagram posts a day and voting with their thumbs, the barriers to entry into the 'art' world are much lower.
As an artist I find looking at art on a phone sized device nauseating. I think the size of the ultimate image makes creating homogeneous images much more likely as you can only see the barest hint of detail, even on a retina screen. Seurat's famous A Sunday on La Grande Jatte is an enormous painting, but seeing it on small screen makes it look like a comic.