Sports are essentially unfair by nature.
Short? Good luck playing basketball and volleyball.
Tall? Forget about artistic gymnastics.
Each sport is heavily suspectible to be dominated by people that possess certain traits. Not to mention the influence of having the money to support a proper diet and training program. Fairness is an illusion.
I don't disagre there is an underlying problem here though. Having a male puberty creates an even bigger gap.
I agree sports are unfair, but we still ban PEDs, certain sports equipment etc. as these are judged to be too unfair.
Specific characteristics like height, VO2 max, foot size etc. impact your ability to become elite at a given sport certainly, but Michael Jordan wasn't the tallest, and the gut with the biggest feet won't necessarily win the swimming race. No specific characteristic can be used to identify the best, and each of them only make a small difference.
Male puberty is worth something like a 10-30% boost in certain physical characteristics where the difference between top athletes is often around 0.5%.
If you have 10 athletes who are elite based on their birth sex, put them in the same sport then we won't know the order within the sexes, but we certainly know that those who underwent male puberty will beat those that didn't.
Transitioning is like "levelling up" in terms of ability for many, hence Lia Thomas went from a top 500 college athlete to a dominant champion.
For me, that's in the "too unfair" category (there are some arguments based on performance data that she is deliberately underperforming so as to not look too bad, although I don't personally find these very persuasive).
I would actually really like an elite male to transition to see what it would be like, as AFAIK there never has been one, just high level athletes who became elite after transition.