There can still be women's teams. If that's what people want then sure. But trans women are women so they should be included. Including women who have been stopped from participating due to high levels of testosterone like I mentioned earlier.
Why? Because you say so isn't really a valid argument. There has been a fully argued case by CAS (the Court of Arbitration for Sport) which has settled the issue beyond further appeal, so I have no idea on what grounds you think this fantasy outcome would occur. Disregarding the rule of law perhaps?
Do you actually know what a valid argument is? Are you going to take it the wrong way if I ask you whether you have been to university and educated in how to construct and justify a point of view, using evidence and critical analysis?
Because you certainly don't give that impression. Occasionally you quote random, biased sources but you still don't manage to concoct any form of universally recognised justification.
You also clearly know very very little about competitive sport and are not a competitor - unlike me. I have medals at athletics, and have represented my county, and certainly know a lot of the upset that Lauren Jeska (formerly the male runner Michael Jameson) caused by taking away championships from women, long before she was sent to prison, because she was so obviously benefitted from a male phenotype when racing.
Your example of gymnastics, as a sport, shows just how ridiculous your proposition is. To have male-female trans athletes competing as women gymnasts would make the sport a laughing stock.