There are tons of self-inflicted rules in the world of photography. The rule of thirds. The sunny f/16 rule. Match your shutter speed to your lens mm. Etc. Do this. Do that.
The rules were created for a reason. The rules can help undisciplined photography turn into decent photography. Without rules even the newest noob can get lucky. But with the rules the noob can be lucky all the time.
IF... You are careful about your subject.
Like actually having one. Actually the more defined your subject the more the viewer will be able to understand your shot. (This is more important than you may guess). Obviously with studio/people/news/sports photography the subject is well defined. Usually Mr. Photog doesn't have to worry about subject. He goes right to composition.
With Nature/Art/Still life/Landscape Photography it gets a little tricky.
In Nature it is easier to know if you have strong subject if you going after an animal or single plant. But if it is a group of animals(Birds.. Ahg) or plants it is more about design then a single subject... In fact the design or composition of the group usually becomes the subject.
"Art" Photography tends to be a very undisciplined segment of photography. Why? Because.
Still Life. Fun stuff. I guess. I am not big into this so figure out how to have a meaningful still-life yourself.
Landscape. This is my all time fave type of photography. It is really challenging to get a good shot. Often an amazing scenic has no strong delineating feature and proves to be a weak or dull photograph.
I have taken thousands -tens of thousands of dull landscape pictures. Why? It wasn't the cameras fault, or the scenery, or the color, or the lighting, or the composition or the rules.
It was a weak subject.
Strengthen your shots by demanding more of your subject.
(Quick tip: Have an awesome landscape that refuses to be interesting? Throw a human being into the shot...)