I loved the Children's Centres. I actually ended up working in one for a while - until it was closed down. ☹️
The fact that the support was available to all was one of the main advantages. Any parent can struggle, need support, need advice or just a friendly person to chat to about their child. I'm middle class but as a new parent of a child who turned out to be neuro diverse, I also greatly benefitted from the help our local centre provided.
There was easy access to support, non judgmental parenting classes, information about weaning, healthy eating, potty training etc etc. Play and Learn sessions had structure, singing, crafts and educational toys. The only thing left round here are basic soft play centres. The kids have fun but all they learn to do is run around madly while their parent watches while having a coffee. Soft play has its place but it certainly doesn't replace what the Children's Centre provided.
The Family Hubs are only available for families already in a great deal of need. Sadly, even with unlimited resources there might not be very much that can be done to significantly improve the outcomes for those children. Obviously help for those children is needed. However, one of the main benefits of the Children's Centre was that a slightly struggling parent could get a little bit of quick support and the problem was helped before any significant issues arose. Now support only comes to those already at rock bottom and who have more problems in their life that mean things like their children having 5 portions of fresh fruit and veg per day doesn't even come close to being on the to do list.
There's an upsurge in children starting school not toilet trained, not able to hold a conversation, not able to sit down for even a very short while. These are the children who never got the chance to go to a Children's Centre.