Just trying to get a sense of how big a problem this is.
That does not matter either. And I am sure we have been through this on other threads. It doesn't matter because for EVERY male who participates in female sports, means a female is not able to. After facing significant oppression in sports, another female will lose an opportunity, yet again, to a male who has had the advantages of having a male puberty, and quite often sexist discrimination already in coaching and training.
And let's NOT forget menstruation challenges.
So.... if only ONE person who has had a male puberty (or in kid's sports is male with those pre-pubescent advantages already starting to be detailed) causes a female to lose their position, that is harmful to woman and girls.
If that male then succeeds at ANY level to then take awards, sponsorship and future earnings from a female, that is all it takes to have a significant effect.
But keep on posting. When you do, you know we answer with evidence and readers are then able to make up their own minds. When you cannot back up your assertions with robust evidence, it simply proves to those seeking evidence that you don't have any and you rely on emotive reasoning which fails to measure up.
Emotive reasoning fails, because it usually ignores the fact that all around the world, it is females who are still oppressed. Any emotive reasoning focuses on people in countries where trans people already have rights and neglects to mention that there are communities, even in those countries, where females are STILL amongst the most oppressed and face significant human rights issues due to being not even recognised as citizens of the countries they live in.
So, please do continue, it is enlightening for all.