I'm going to point out that the statement released is contrary to all evidence that exist prior to it. Stormy being the one pushing to collab with more partners and pushing into the industry more while kawaii was only wanting to work with her husband. Having your significant other start transitioning to whatever is a mindfuck regardless of your feelings on it. Once the dust settles and it becomes clear the person is going to continue down that path, you have to decide if that's the same person you sought that relationship with.
Calling it "transphobia" is a copout to what it is, someone isn't happy with who the person they married is turning into.
As for "throwing away a career", she changed paths in life and no longer is comfortable with that association. This isn't that atypical of a situation for those leaving porn. Much like an addict for comparison, you have to cut out the contacts in your life that encouraged it and often those still in it. Otherwise the door to return is always one short thought away.
Does any of this mean Kawaii is "innocent" or didn't do something? No. It just means that when only one side is speaking, you only have half a picture that happens to be most supportive to their position.. Simply put, Kawaii left porn, Stormy doubled down into it.
For all we know she wanted a family and that dream came crashing down once the transition started.
Edit: Since I didn't address this part, how many people would be comfortable with your ex maintaining a relationship of any kind with someone they were with for more than 10 years? Not many.. and allowing it vs comfort is another story.