According to probably unreliable studies, around 0.6% of the population is trans.
The fastest woman in the world can be beat by the top 300 high school male athletes.
And according to the study, 0.6% of boys will identify as trans women. 0.6% of 300 is 1.8, meaning that at any time, around 2 of the high schoolers who can beat the best female runner in the world will identify as women, and be allowed to compete.
So yes, no cis woman will ever win gold again.
Maybe they should create a league for cis women so they have a chance to compete with others like them. We could call it the inferior league, so that men who identify as trans-women won’t want to join up in the that league out of embarrassment.