You're so busy being anti-trans you forget about those for whom gender isn't a 'choice'
You're so busy being woke you forget about facts.
For a start, CS isn't trans, she is intersex.
Yes, the lowering of testosterone levels may (hopefully) have implications of TW competing in women's sport, but this ruling is about XY intersex individuals with DSD, not trans people and has nothing to do with 'gender'.
From what I have read, CS has internal testes and XY (not XX) chromosomes so was not born female, but was believed to be female at birth due to the lack of external male genitalia. This should have been identified during puberty but was not.
I have every sympathy for her and the amount of effort she has put in training for her sport, however allowing her to compete against women (XX with normal female levels of testosterone) is unfair. This is the right decision to maintain the integrity of women's sport.