I agree on both counts. Caster tried testosterone suppressing drugs but, unsurprisingly, felt like tit and didn’t run well. Caster only wins because he’s a biological male competing in the female category.To my mind, if Caster wants to compete as a woman, they would need to have the testosterone reducing drugs, but I can equally see why someone may not want to change the hormones their body naturally produces
I believe Caster knew the truth about his DSD well before he was winning medals on the world stage. This alleged female birth cert at age 16 would corroborate the theory that Caster was scouted as someone who could masquerade as female, and this wasn’t an entirely uncommon practice in certain African nations.
Edit: Cross posted with @SkippyDoo