There would still be top female athletes, but it would be based on skill class, right? Kind of like lightweight champions and heavyweight champions.
It's not as if every single female is going to be out-competed in every skill class.
How would you separate 2 swimmers (one trans,
& one cis) capable of different significantly different
times in a race? (The trans is faster.)
Next question...
What if 2 swimmers have nearly identical performance,
but the trans female swimmer wins repeatedly?
Do you think cis women would be satisfied with
their accomplishments under your system?
Finally, why not have totally separate events
for cis & trans women (as others have suggested)?