Does your photography move you emotionally? Do other people comment on how it moves them? Is there a “wow” factor?
Experienced photographers who share their knowledge with new photographers spend a lot of time talking about composition and the “rules”. Leading lines, rule of thirds, negative space, etc. help to teach the eye what to look for when evaluating a scene. But they don’t spend a lot of time talking about why these rules matter at all.
I can only find one answer: it’s an effort to disrupt the composure of anyone who views the image. To get a reaction. Most often positively, sometimes with delight, and sometimes deliberately negatively. The “rules” provide a roadmap for the senses, and by extension, for the emotions. To be truly successful as a photographer, you have to tap into that emotion – yours and your viewers.