This comment stood out to me.
Criticisms were levelled at social services in the review, including that too much emphasis was placed on supporting the parents with their addiction and mental health needs and not enough on the reality of life for their children.
I think Social Workers have a very difficult job, judged for removing children and not supporting parents to improve, or judged for supporting parents and leaving children at risk. If anyone was to make a comment here about sterilising the parents to be certain no more children could be born into that environment there would be many posters who disagreed with that but I cannot put the rights of the adult ahead of the rights of children in this situation and there were four children mentioned in the news report. I don't believe you have the raw materials to make a decent parent if your starting point is teaching them it's wrong to inject children with heroin.
As a society we need to be very clear and certain about our priorities. Where children's safety and well being is at risk the adults in the situation should always be a secondary concern. People may be so damaged by their own upbringing they struggle to parent well but my sympathy for that would never take a higher priority than the safety of children.
At the bottom of the page linked in the OP there were several other stories about horrific abuse of children, it makes me sad and angry that we keep "giving the benefit of the doubt" to people who have proved they are not fit to parent.