There are only boys and girls. Transgender "boys" and "girls" are, biologically, a fiction.
It's absolutely insane to say that boys cannot destroy girls sports. It has already happened. Thank God the supreme court is going to help put a stop to it. But if people like Kagan, Sotomayor, and Jackson were in the majority, we would have boys competing against (and destroying) girls and girls sports. This is a no brainer.
Thank you for your clarification regarding transgender 'boys' and 'girls' being biologically a fiction. However, your opinion on this matter is an oversimplification of a complex issue.
Scientifically, biological sex is a label assigned by a medical professional at birth based on physical characteristics (genitalia) and other biological determinants.
Chromosomal and genetic factors matter. While XX and XY chromosomes are often associated with female and male sexes, variations such as XXY, XYY, and others also occur in an estimated 1 in 1,500 to 1 in 2,000 live births, which amounts to approximately 200,000 to 330,000 Americans based on the current population.
https://www.asrm.org/advocacy-and-policy/fact-sheets-and-one-pagers/just-the-facts-biological-sex/