I don't know what kind of family centre Gillybob's friend worked at but it is nothing like the large number of family centres I've been involved with over many years.
All children now get 30 hours free child care a week, whether their parents are working or not. It's an inexpensive way of attempting to involve parents in the support services on offer. For those parents who have drug/alcohol/mental health issues that mean their parenting is less than optimal but doesn't hit the post so far as safeguarding/state intervention goes, the child care place ensures those children are socialised, have access to the kind of play equipment and stimulation all children need. It helps them prepare for school.
It may also help a family stay together, give a parent a much needed break or time to see an advisor on m/h/drugs etc or domestic abuse. Hogarth's cartoons in the 18th century showed Gin Lane in all its glory. Britain has always had feckless drunken parents. I don't defend their behaviour or the neglect of their children. It's a reality. Family Centres, drug/alcohol units, front line preventive social work, psychologists etc etc are all needed if we're to make headway rather than go ever backwards.