I’m afraid that whilst feminism does centre women and girls, it fiercely discards the rest of humanity.
"Fiercely discards"? Seems weird. But even then, so what?
It's not feminism's job to be the centrist decision maker doing the compromises between all competing interests.
It's feminism's job to represent women's interests to the decision makers.
The governing bodies (or governments, courts, etc) are there to make sure the rest of humanity is not "discarded".
If feminists don't fight clearly for women, no-one else will.
Christine Mbomba, whilst having male chromosomes, is not a fully sexually mature male, due to DSD
Mbomba is a fully mature male. Maybe not "sexually mature" in that they may not be able to reproduce, but they've undergone complete male puberty, and you do not play sport with your genitals. Why would you think a genital issue would impair performance in any way? What evidence do you have that lack of penis makes you a slower runner?
You're making bold assertions here that don't smell right in a common sense test.