We live in an era of artists rebelling against boundaries. It's nothing new-- questioning boundaries is a driving force that keeps humans evolving. But too often a principle gets mislabeled as a boundary and consequently gets abandoned, to the detriment of the artist.
There are artists among us who consider composition principles boundaries. These folks complain that if they spend their energy concentrating on the principles while painting, they'd give up. And some argue that principles serve only to inhibit the creative process. They complain that they're not interested in making great works of art, just finding some joy in life. They just want to paint and not be bothered with having to think about it.
BOUNDARIES VS PRINCIPLES
A boundary is a wall or a line of demarcation. It's intention is to define two sides of a place or thing or to limit access. It's purpose is to divide.
A principle is a fundamental of how something works. Its function is to hold something together, not to limit or divide.
To reject learning and using principles of composition is to limit the scope of ones creative potential. The boundary is not the principle itself, rather the projection we place on it when we make assumptions about it rather than to take the effort to explore its possibilities.