Exogenous testosterone doesn't help in events like track and field. Maybe sprinting but there are better tools for the job.

But your comment does touch up on something else which is the fact that men and women very much have biological differences that are complimentary to our survival as a species and trying to ignore or say they don't exist smacks the face of reality hard.

But the linked article indeed touches upon a unique edge case and it's something that these games will need to address, the 3rd option. Unfortunately by genetics these "intersex" people are not men OR women, they are aberrations and unique which I would say should preclude them from competing entirely because they aren't technically men or women.