I agree with your sentiments, JLZ and SA. Prevention is definitely better than cure.
Education and support is key IMO.
First, education in schools and/or the community about the reality of bringing children into unstable family situations and, second, adequate support for a parent or parents when difficulties arise.
Unfortunately, there will always be those children who, for whatever reason, need to be placed with foster families or, alternatively, in institutional care but those placements need to be of an excellent standard, staffed by well remunerated, supported, professional and highly experienced carers.
In a perfect world, every child would be loved, well cared for and protected. Tragically, this was not the case for little Tia, as it isn’t for so many children.
I wish I had the answers to prevent further harm coming to just one child. Sadly, I don’t.
Yes there will be children who can't be raised by their birth parents. But what we are hearing is that the departments are overwhelmed by the increasing numbers of children at risk. The staff can't cope so they prioritize and cut corners. There aren't enough people willing and able to foster anyway. Either you accept the odd child murder as inevitable--"nobody could have foreseen" etc etc (repeat as needed)--and lots of lesser damage, ruined lives, or you pour money into the system so staff can do a ten times' better job, or--what?