This is what I know about bigoted cis people and the whole fuck-lathered issue of sports:
1) They refuse to accept research showing that HRT removes differences between cis female athletic performance and trans female athletic performance.
2) They use #1 in complaining about transfem athletes having unfair advantages from a "male puberty."
3) They refuse to accept research showing access to puberty blockers and other trans medical care saves trans kids' lives and is beneficial to them.