You have chosen to consider an athletic sport performance an "Art" which of course is your right and highlights the issue since there is no agreement as to how the term is defined . "Though
the definition of what constitutes art is disputed[5][6][7] and has changed over time, general descriptions mention an idea of imaginative or technical skill stemming from
human agency[8] and creation.
[9] The nature of art and related concepts, such as creativity and interpretation, are explored in a branch of philosophy known as
aesthetics" From Wikepedia. (Emphasis supplied)
It is impossible to have an effective discussion if people do not agree how terms are defined. I understand but reject your contention that a good athletic performance is although a thing of beauty is considered "Art" for purposes of these discussions. Within the sport there is no winning advantage to considering how aesthetically pleasing someone considers your performance. Within a martial art there are parameters where the aesthetics are judge. Again, therein lies the crux of the issue. Is everyone who is kicking and punching or grappling involved in a "Martial Art" ? Tae Bo? Cardio Kickboxing? Perhaps the terminology needs refinement although I have no hope this will happen or there will be universal acceptance of narrower terms like. "Martial Sport" Martial Exercise" etc.