I disagree with the premise of the OP.
There are absolutely rules. But the fundamental mistake that people are making when they talk about "rules" and photography is to assume that it's a coherent set of rules that can always be followed. The reality is that the rules contradict, there are too many of them, it's impossible to follow them all simultaneously.
Let me give just two examples: a clear depth of field can provide a foreground and background which can help lead the viewer's eye/perspective to your subjective and they can provide perspective (so a clear and wide DoF is a good thing). Except that a limited DoF produces a lovely portrait by removing distractions. Wait! Those fricking contradict! Which rule am I supposed to follow? I can't have a sharp foreground/background AND a narrow DoF. Unless I'm playing with a Lensbaby with it's distorted DoF (oops, a THIRD rule about altering perspective and how it can be attention grabbing).
I'm serious when I say there are thousands rules about photography and visual design. Which do you use--color or B&W? And if it's color, vivid or faded? Or color that is tone on tone or contrast? Or complimentary? Or color that sets a tone (a portrait with lots of blues and a melancholy expression or one that is warm with a model who is smiling)? And if instead you go for B&W, is it stark with lots of contrast and dynamic range or muted/faded. There are rules about color (complimentary is good, contrast is good, tone on tone is good, absence of color is good) and they contradict. And of course we all know that sharp and distinct is good. Except I'd argue that one of the three best photos of WWII is a mass of blur and would be significantly less effective it were sharp and distinct and focused:
Capa omaha beach Except when we want a lot of grain. Or we intentionally blur to convey movement (think panning). But wait--that contradicts the rule about shooting with a stable platform b/c we're moving the camera intentionally and deliberately removing stability. Folks I've just listed a bunch of rules--they're all RULES. But you can't follow them all simultaneously.
You see (and this goes to Derrel's point), it's not that a good artist ignores the rules. There are thousands of 'em. It's that a good artist picks which rules to follow (and which ones to ignore) with any given photo they create. That's what makes this an art. Not the fact that there are rules (there are rules when you drive your car but that doesn't make driving to the bank or grocery store an art). It's that a good visual artist looks at a setting and consciously or unconsciously selects a set of rules to follow or give precedence to (and thereby ignoring or deliberately violating the rules that contradict). When I compose a shot to use negative space, I'm ignoring--no, I'm deliberately choosing this rule over ones that talk about balance in the photo as well as props and settings that provide context and interest. When in that same picture I place my subject in one corner looking anxiously to the other side of the photo, I'm using that negative space and location to convey a feeling to the photo and I'm selecting it over the rule of thirds and Cartier-Bresson's "golden spiral".
We are not just geeks with expensive toys. We aren't just "lucky" ("uh, gee, I just happened to push the shutter at the right time!"). But a damn good photographer is an artist. And that means they create the photo. And why Mish and Lew and the rest of us could go on a meet-up in DC, look at a setting, and produce different (yet compelling) views of that same approximate setting is b/c each of us chose different rules to apply in that instance. And that's what art is all about. Is why Carravagio would provide tremendous detail in his morbid work while Renoir would instead make an "impression" (rather than a detailed replica) of flowers with lots of color, and Dali would put the flowers with a floating corpse and a floppy pocket watch. They were all effective. They were all following rules of visual design. But they all chose to ignore other rules.
Don't confuse photographic rules as a set of requirements we must follow (how most of the world operates with rules) and instead recognize them as a set of choices or paths as to what your art is to be as well as an explanation of why certain types of images or dynamics within the image impact our perception. And if you choose wisely, you get people going "wow!" and if you choose poorly you get people going "well, at least you remembered to take lens cap off." No-one ever ignores all the rules b/c if your photography works, it's b/c there are a set of visual design rules that you followed (either deliberately or out of ignorance). It's just that there isn't just one set of rules. Like I said, there are literally thousands of 'em. And the more knowledgable you are about the rules of visual design, the more conscious and deliberate (vs. accidental and lucky) you can be with your art.