Art has always been divisive. As long as there have been people creating, there have been people speaking about those creations, writing about them, screaming about them. Art and critique go hand in hand. Some say that the most important facet of a painting is balance, the use of negative space on the canvas, intelligent use of colours, perspective etc. Etc. Etc.
Those people are wrong.
The most important thing, the aspect that needs to be perfect for a true work of art, is light and shadow....