I'm another person who is shocked that you watched Cathy Come Home and took away the message you've put in your OP. Cathy and Reg and doing fine financially when they start their family. Then Reg loses his job due to injury. It could happen to anyone. The message is really an argument for the welfare state to effectively support families before they slide into destitution
First of all, I didn't miss the point of Cathy Come Home and am well aware the message was that the welfare state should assist and not condemn those who slide into poverty through no fault of their own. I was also quite shocked that the housing shortages and slum living of the 1960s is not so terribly different from what we are experiencing today.
However - and please note I'm not using this as a stick to beat them with - when Reg lost his job they had just one child and during the further decline of their circumstances they ended up having two others. I'm in no way even saying they shouldn't have done so, but I couldn't help but think perhaps it might've been better if they had not had further children while in the process of trying to find accommodation.
That's it - it was not a condemnation, just an observation. I also said the whole situation was heartbreaking in my OP, and only really started the thread as an avenue for discussion.
I'm not entirely sure where my own views lie. I'm probably closest to the idea that our planet is overpopulated and resources scarce, but even then don't see how on an ideological or ethical level we could actively prohibit people having children. That said, I do lean towards the view that if your current circumstances are insecure, you should perhaps wait until they stabilise before planning future children.
And then of course no-one knows how secure their future will be, so we're right back to not knowing what to do, as if you wait for a future that never arises to have kids it may be too late.
So yes, it's an interesting debate with no easy answers.