Ask any of the women who have gone full-time and agree with it. Many of them didn't quite believe it before going full-time, but like clockwork, going full-time is a fundamentally different experience.
Trans women who are mid-transition and part time are women, and have a lot of valuable experiences. Still, there is a huge difference in practical terms between full-time and not-full-time. It's the difference between having "hiding places" and having "nowhere to hide", and between "living as a gender" and "going out as a gender". It's also usually when you transition at work, and open up the biggest can of worms you've ever seen.
We did not really start as CDs, but more importantly, we are NOT "high level" or "end of the road" CDs. We are not "dressers". We didn't commit to transition, we just committed to being who we really are. The only thing we all overcame was all of the lying to ourselves and others.
This is the type of language that causes us problems here. While you may not see it this way, it tries to erase our identity as women. More importantly, it sets you up for this false sense of "hierarchy". We're not the end of the road for you. We're on another road, with some more or less superficial similarities.