I have heard of the case of Adam Graham who started identifying as "Idla Bryson" after he was convicted of raping to women and I csn guarantee you I am definitely not inclined to defend him at all. He is obviously using "trans identity" to get away with a lighter sentence for his crimes, I'm pretty he isn't even trans, he is just pretending to be so he can got a lighter prison sentence and be put in a women's prison which would of course endanger female inmates giving him the opportunity to rape as he pleases and claim to be a "victim of transphobia" to get away with it. I have heard of a case of a girl in a highschool in Loudoun County, Virginia who was raped in the bathroom by another student who claimed to be trans. But one point I want to make is that trans bathrooms are not the only places where women get raped and I don't think we should target specifically trans bathrooms as if they are some Hotspot of rape and transgender people are all rapists. Now regarding child marriage laws, you are ignoring the fact that underage girls being forced to marry creepy older men is a problem especially girls whose families live in poverty and are taken advantage of in their abject situation.
Here is one example: https://www.theguardian.com/society/article/2024/jul/09/child-marriage-laws
Here is a whole compilation of U.S. child marriage survivors from the Tahiri Justice Center: https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.tahirih.org/wp-content/uploads/2020/01/2019-Child-Marriage-Survivor-Story-Compilation-FOR-WEB-updated.pdf&ved=2ahUKEwi80OKS4v-JAxUHhYkEHfROCgYQFnoECBoQAQ&usg=AOvVaw3OuZ86eX6YrVIAUDJfDGXn
Some states even have legal loopholes that let creepy older men marry girls as young as 10: https://www.independent.co.uk/news/world/americas/200-000-children-married-us-15-years-child-marriage-child-brides-new-jersey-chris-christie-a7830266.html