the question is answered by Mark Adams at around 41 minutes, here
there's a follow up question at around 46 minutes
the argument seems to be that the IBA had no business testing these nice ladies, they were eligible for the competition, the end.
which does bring the tweet quoted by Eresh above to mind:
Tell me why the first proposition makes sense but the second one is absurd. This could make a first year logic exam.
We have sex categories but we are not allowed to do a sex test.
We have weight categories but we are not allowed to weigh the athletes.