Doodledog
*As transmen and non-binary people exist the concept that transwomen only become trans in order to take over women's roles and functions is flawed.*
But nobody has said that. You are twisting words again. As I see it, there are people who become trans because they are driven to do so by a desire to change sex, and there are those who do it for nefarious reasons, as saying they are women is a means for some men to access women's spaces and dominate them. The former group are victims of the TWAW agenda every bit as much as women are (in different ways). They are tarred with the same brush as the latter group, which is very unfortunate. Nevertheless, the fact that the latter group exists is why a lot of women don't want self-id to allow any man who says the magic words to access all areas.
It isn't a question of twisting words, it is a question of ignoring what doesn't fit the proposal. So the emphasis is always on transwomen and transmen are largely ignored, probably because dealing with them means that the motivation and the reason for anyone transitioning is then brought into question. After all if men are motivated to become transwomen to gain some sort of power, the same motivation should surely be found in transmen. But if the motivation is purely that their bodies do not fit their assigned sex then the concept becomes much more logical.
As for the allegation that most transwomen are OK but the movement is being used by male predators. That may possibly be true, but even if it is why attack transwomen who are doing valuable jobs? Why not just let them get on with it? There were 480,000 transwomen in the last census (and the same number of transmen.) If predators are using the trans situation to enable them to abuse women, then transwomen deserve our concerns and sympathy even more, because not only does this open them up to abuse for their trans status, they also are just as liable to assault as cis women.