Maternity leave is for the mother to recover from pregnancy and childbirth. If you have a stillbirth or your baby dies, you are still entitled to all your maternity pay and time off. It is not there for the benefit of the baby but for the recovery of the mother. This is why I am a little bit 🤔about shared parental leave, although I know a lot of families find it useful, because it somewhat disregards that need for recovery time for the mother.
I think you are being extraordinarily starry-eyed to be honest if you expect this Tory govt to even pretend to care about anybody's wellbeing, be they babies, parents or anyone else. They care about money, pure and simple, and the ability of themselves and people like them to make as much of it as possible, and for that you need as many economically productive units in action as possible. Their entire policy portfolio is based around how to achieve that, with the exception of immigration, which is their vote-winner so the people being ground up by their economic policies will continue to vote for them based on their lip service to this one emotive issue.
I also think you are being starry-eyed about the number of people for whom there is 'choice' of any kind about childcare. We are in the grip of a trickle-up economy where more and more wealth and assets are being transferred away from the majority into the control of a tiny minority. Fewer and fewer people have the 'choice' to stay at home or the 'choice' to go to work - their decisions are made in an environment of extreme economic threat, and are not real choices at all.
Basically, no offence, I think you are one of the fortunate people who can decide to 'go without a few luxuries' to work part time but still spend lots of time with your young child(ren), maybe your partner does the same so they have to spend even less time in childcare and you can feel a rosy glow of righteousness whilst still being able to advance in your (likely desk-based, flexible location, flexible work hours) career. That is a very comfortable position from which to pontificate about 'what's in the interests of the children'.
Whereas for other people who already have to return to work far sooner than they'd like to make less than they need, these free hours will be an unexpected boon to an overstretched budget. For people who have made the difficult decision to remain economically inactive due to the prohibitive cost of childcare, and make do with not enough coming in from one wage, free hours from earlier on may make the difference between defaulting on their mortgage and losing their home or being able to make ends meet with part time work until child goes to school.
You keep saying 'lets discount all those people' so you can make your judgment argument stand up. But that's because you are not 'those people', you don't know any of 'those people', and you frankly don't care about 'those people' - or their children. They're not real to you so they don't factor into your assessment of this policy.
The problem isn't the free hours per se - it's the economic environment that makes them necessary for survival, it's the beast they feed, and it's the heartless bastard Tory government who makes it this way ON PURPOSE. Parents - you will be shocked to hear - by and large make their decisions based on an assessment of their circumstances, the prevailing conditions, and what is best for their child in both the short and the long term. The issue is the prevailing conditions that make them either feel they can't return to work, or they can't choose not to.