In some ways its true but some interesting questions come up when you legislate gender and race into law and then accept that race and gender are fluid. If a company/government/university has a quota for men or women then can one change their gender to qualify. There are grants and carve-outs for woman owned businesses for example. Can I self identify as a black woman can claim them? This wouldn't be a problem if we just didn't put gender and race into law but since we do, it is. Its the same argument I had against gay marriage expansion, its not that gays shouldn't marry its that they government should have no say in what is/isn't marriage. Marriage licenses and marriage as a legal state recognized concept should not exists. One should not get any benefits or have to pay extra taxes just because they got married.- they can already vote, they can already marry, they can already serve in the military, they can already enjoy full citizenship in every way shape or form, the only legislative question left is "where to pee."
This is the crux of the issue: are we concerned about people taking advantage of transgender norms in order to further their cisgender motives? Or are we only pretending to be? I worked for a Disadvantaged Business Enterprise that did all sorts of contracting. We still had to get the work. We often didn't. We had more opportunities than we might have had with a male president, but not enough to care about. Certainly not enough to bother going Tootsie on it. And that was government work anyway. You get zero legs up as a DBE in the private sector. I agree with you on the "ban all marriages" front and have said as much for years. But that's not going to happen and we all know it.