And I will say it even slower.... if the top 0.1% of the population are transwomen displacing ciswomen then they are excluding the 0.1% of ciswomen who would have been competing at the top. Not ALL women.
That's nonsense. That's playing with the categories differently depending on what you want to argue.
You're arguing that to be "fair" we have to let trans-women compete in the female category. You don't seem to be arguing that they would probably significantly overwhelm that category.
But then where the ~50% of cis-women are supposed to compete gets brushed aside with... nothing. Just nothing.
You've divided it into 4 categories for your purposes, but back into two when it doesn't suit your needs.