Or just turn all these complicated metrics into a score number that puts people in separate brackets. 

The sport needs to have as many categories it needs to call the competition between any 2 players fair. Today, the gender-based one is just way too broad. 

 bs.
you can't have 200 categories and all participants winning in their own one.
just keep sport to people who understands more 

 What makes you think this generates 200 categories? Each sport can group into as many or as few categories they see fit. 

 what makes you think that doing so is a good idea?
I think dividing by gender, age, and weight is good for the most of sports.