The definition of words isn’t decided by any of those people, its definition is just a reflection of its usage by the public.
Motor racing is the act of racing vehicles, the pilots can be humans, dogs, monkeys or machines but it would still be classed as a sport.
Not 100% sure on this. There will need to be quite some change in definitions, if at all, before "sport" between machines is accepted, as all the definitions refer to "human" attributes:
From various dictionaries - Sport:
o An athletic activity requiring skill or physical prowess and often of a competitive nature, as racing, baseball, tennis, golf, bowling, wrestling, boxing, hunting, fishing, etc.
o An activity involving physical exertion and skill in which an individual or team competes against another or others for entertainment.
o A game, competition, or activity needing physical effort and skill that is played or done according to rules, for enjoyment and/or as a job
From Wikipedia - Sport:
o- According to Council of Europe, European Sports Charter, article 2.i, " "Sport" means all forms of physical activity which, through casual or organised participation, aim at expressing or improving physical fitness and mental well-being.
o- Other bodies advocate widening the definition of sport to include all physical activity. For instance, the Council of Europe include all forms of physical exercise, including those competed just for fun.
o- There has been an increase in the application of the term "sport" to a wider set of non-physical challenges such as video games, also called esports, especially due to the large scale of participation and organised competition, but these are not widely recognised by mainstream sports organisations.
I guess that's why they call it "artificial intelligence"....