To put it more succinctly, the surge of fascism around the world is going to force almost all trans people to make very difficult decisions about our future. Some will have to give up hormones and surgeries. Others will be coerced back into the closet entirely, as not doing so may result in social ostracization, corrective rape, and/or death. Even the relative few who pass consitently and have transitioned socially and legally may have their medical history held against them.
Given these circumstances, it makes sense people would be in the closet. Historically, and in many places around the world today, many trans people have had to make the very difficult decisions to live most (if not all) of their lives in the closet. Its a logical, reasonable response.
With that said, many trans people simply cannot or will not go back in the closet no matter what external circumstances try to force it. The reasons for this are extremely varied and not really worth getting into here, but suffice it to say that any form of detrasitioning or going back in the closet is just not possible for people within this group. In fact, the act of being forced to go back into the closet/detransition (even partially) would either kill them outright or result in a fate worse than death. This is the basis for the phrase "death before detransition" - it is not hyperbolic, it is a reality for many, many trans and queer people.
I myself belong to this group, as do most of the transfemmes I've met (by their own admission). Obviously other trans and queer can belong to this group. And likewise, not all transfemmes fall into this category either.
If you can see a future for yourself where you are coerced back into the closet, no matter how bleak it may be, you do not belong to that group. And though you may not feel this way, it is a privilege to be outside this group. The stakes are different.
Can you blame anyone from a group that is so vulnerable if they feel betrayed by the people who can omit themselves from it? Though the reasoning to return to the closet makes sense, you are abandoning the people who don't have that choice to save yourself. The more people who reject sex-based oppression rhetoric and refuse to be degendered by a transphobic world is better for all of us. We need to show solidarity with the most vulnerable people in our demographic, now more than ever.
I think the people who lean into sex-based oppression at the expense of transfeminists ultimately know what they're doing and know they're abandoning the people who cannot escape their gendered oppression no matter what they do. And instead of owning it, they blame the vulnerable (and inconvenient) population that reminds them of their own privilege. And their own cowardice. And if you're projecting your insecurities onto transfemmes as a whole, you are going to inevitably fall into terf rhetoric.
Hence, the creation of so-called "transandrophobia".