ExitPursuedByABear
But to change sex. That is one hell of a price to pay.
venusinscorpio
All you actually have to do is take the hormones for a year, then compete, then conveniently if you want to revert before the next Olympics, you can stop taking them and change back to a man again.
It would be incredibly hard with many barriers in the way.
Getting the hormones to a permitted level and keeping them there is unlikely to take just a year (a period which the guidelines suggest extending if necessary).
To compete in the Olympics, you have to do well enough in other qualifying competitions to get selected. You then have to meet ongoing requirements to avoid deselection. Training for the Olympics is not a cheap process, involving international competitions and training events. Funding is limited. Some athletes still need to work for a living as well as train.
There's no guarantee that a male athlete taking hormones would satisfy the eligibility criteria or be selected or get the necessary funding. It's not a given that a decent male athlete would prove exceptional if he took hormones and competed in the women's category. He'd have to train whilst contending with all sorts of changes to his body, as well as side effects from the drugs.
It's not a risk that's likely to pay off and it's not likely to go unnoticed or unchecked.