I'll repeat what I've always said about Caster. It must have been incredibly challenging to find out as a late teen that even though you didn't have a male sexual organ that you are XY and have no womb/ovaries, etc. I love how she's been strong and flexed and stood up for herself.
That being said, these comments don't exactly endear her to me. She misses the nuance of the argument.
She seems oblivious of the fact that she's "the best in the world" in a special cateogry - women's athletics. She's not the best in the world period. There are hundreds if not thousands of men better than her. In a day and age that we let people self identify their gender legally, we must have rules as to who can and can't compete in women's athletics.