I think Rowling should stick to writing books also some others who should stick to their field that made them famous which adds weight to their personal perspective.
The question in this case is do the points noticed enhance boxing ability to the extent that it gives an unfair advantage. Most sports are split male female as in many cases the male would have an unfair advantage.
Changing tack a 6ft6 male is more likely to be of use to a basket ball team than some one who is 5ft.
Maybe a bit of an exaggeration so just a point.
Boxing has similar factors.Take heavyweight championship fight. Look at the details and a number of physical details will be found Span and others. Fact is if some one comes along who is too different to the other they would be better off choosing some other sport as they are highly unlikely to win or even get to fight any where near this level.
Strength. Women just like men can increase it. Training figures and even diet in some respects. Drugs may too. Body weight is influenced by several factors not just muscle mass.
TBH honest I got the impression that there was a physical sizes mismatch so one fighter was at a disadvantage from the word go. Camera angles don't help with making a definite comparison.
The winner was born female Has the correct bits as far as we know so the question is what effect the noted differences to the "norm" make.
For fun I'll throw in another factor
In humans, conditions that involve discrepancies between external genitalia and internal reproductive organs are described by the term
intersex. Intersex conditions are sometimes also referred to as disorders of sexual development (DSDs). Such conditions are extremely rare in humans. In ovotesticular disorder (sometimes also called true hermaphroditism), an individual has both ovarian and testicular
tissue. The ovarian and testicular tissue may be separate, or the two may be combined in what is called an ovotestis.
Hermaphroditism, the condition of having both male and female reproductive organs. In humans, conditions that involve discrepancies between external genitalia and internal reproductive organs are described by the term ‘intersex.’ Learn about different forms of hermaphroditism and their treatment.
www.britannica.com