Art is a form and construction of imagination, and the imagination can sometimes lead to illusion. Optical illusion is one type of illusion that differs from reality. All the information is gathered visually and processed in the brain. Whatever you see will be transformed in the brain, therefore, it can create confusion. Many illusions lead to confusion.
Illusion can be hard to deal with but at the same time it can be considered as an escape from reality. Living in a stressful world, people need to escape in order to have a healthy mind again. Just as in the picture, people play with the art and puzzle themselves as they are living in a reality or virtual world.
It is same as escaping to nature, such as hiking. People want to be separated from their busy life and feel released from the tension.
Art is just a different form of getaway.