The idea of competitive sports exists in a framework of discrimination means that you will always have unhappy people.
The good news is that sports, for the most part, is mostly symbolic, and rarely affects ones livelihood.
Just about anything competitive is discriminatory. People are disadvantaged by genetics, disability/health issues, age, wealth inequality, and more.
But as a society we love competitive activities, so the best we can do is come up with rules to try and impose a reasonable amount of fairness.
The problem is that there is only so much attention to go around, so we cannot have too many splits; depending on the sport it might just not be financially doable. We also don't want the split to be effectively "the best" and "the second best", because nobody is going to fund millions in advertising for the second best. So, a split like men/women is not surprising as a historical compromise to ensure there's still some attention on those competing in a lighter weight class.
Generically changing it to lightweights/heavyweights might be a reasonable compromise as well, or an age line, or something like that; it will depend on the sport and the market to draw that out. I wouldn't at all be surprised if the thing that makes sense is to continue with the existing split, though....
I’m much stronger than her. I’ve got 2x the lung capacity she does.
If you’re going to divide competition by one trait, sex is the clear winner.
Where I am from, there is so little interest in the Olympics that I doubt even half my countries' population would be interested. I have never watched the Olympics ever, and amongst my family and friends, there is little to no mention of it. It is a minor cultural phenomena. This seems to me like there were large extrapolations made.
During the last few decades, for various reasons the interest in several kinds of sports events, including the Olympics, has become much lower than before. Other forms of entertainment that were popular in the past have been similarly affected.
However, when I was a child, a half of century ago, the Olympics was not a minor cultural phenomena, but a really major event in which the majority of the people all over the world would be interested.