The state and its institutions are riddled with misogyny, we already know this on the feminist boards, so I'm not really sure I can trust the state's opinions about mothers who "lack mental capacity"
The court is not the state. Hence the fact that, for instance, the court regularly makes findings against the state. And the judge in this case was a woman who had extensive experience as a barrister in human rights law.
If a woman is judged as lacking capacity to be a mother why is she only told this after she has conceived?
How do you know she was only "told" this after she conceived?
Why does the state lead women to believe they can have a baby like anyone else only to decide mid-pregnancy that she can't?
It doesn't. The worst you can say is the law works on the basis of minimal interference, so it doesn't automatically sterilise all women who lack capacity.
it won't offer women the support they need to keep their babies, whatever support that might be ( 24 hour care, mother and baby units)
Given that this woman is potentially a danger to her child, keeping them together by these means potentially involves effectively imprisoning both of them till the child is at least 16. How is that humane?
Feminist theory posits that sexual intercourse is not a biological urge or natural but is socially constructed and pushed onto women.
And that particular bit of feminist theory is demonstrably total rubbish.
All the people who have judged her as lacking the capacity to be a mother, should have been there to prevent her from having sexual intercourse. Or At the very least making sure she had contraception.
It would be incredibly interfering to stop her having sexual intercourse. I would agree that someone (in her case, her mother) should probably have done something about contraception, but we don't know the circumstances. If you are going to advocate compulsory sterilisation for the mentally unfit, that's a very dangerous road to go down.
Her capacity hasn't changed, it's a constant.
Not so. For a lot of people, capacity fluctuates.