"it was about establishing the criminal liability of mothers. I'm confused that you can dispute that."
No,
It was not.
The case was heard in the Court of Appeal CIVIL division. Not criminal.
It involved personal injuries lawyers - again, not criminal lawyers. www.apil.org.uk/injury-lawyer-details.aspx?id=182
It was a CIVIL case, between the child and the CICA.
No criminal liability would have been established, in particular because the standard of proof required by the CICA is 'balance of probabilities', whereas a criminal conviction would require 'beyond reasonable doubt'.
The precedent here binds civil courts - it does not bind criminal courts, and it does not, in fact, prevent women being prosecuted criminally for drinking, so there is as such no victory for women's rights.
It is true that CICA compensation means that, on the balance of probabilities, a crime has been committed, but it's perfectly consistent and pragmatic for the civil courts to say that a crime has 'probably' been committed, and for the criminal courts on the other hand to say 'not guilty'.
"if damaging your child during pregnancy is not a crime (and it isn't) "
It is a crime if done with intent to kill/abort the foetus.