I'm one of five and we grew up in poverty in the 70's and 80's. My mother made it very clear to everyone that she didn't want to get a job so kept having kids instead. She lost interest after the baby stage with all of us, particularly her two eldest - my sister and I. We were mostly brought up by our grandparents, who were then too old to do the same for the younger three.
My dad just went along with it because it made her happy and life was easier for everyone if she was happy 🤷♀️
Both my sister and I (we think,of ourselves as a family of two and don't have contact with the other three) made the connection at a young age that lots of children = poverty so we both decided to opt,out of that and not have children. We are both married/engaged and have wonderful, fulfilling lives with fantastic jobs that help,society more than our mother ever did (im a doctor ans she's a human rights lawyer). Our siblings are mostly living around the same area where we grew up and our brother has several children with several women because he's a total,knob. I very much doubt he pays any maintenance to any of them as he does cash in hand jobs. Our sisters married young, had lots of kids 4 for one and 6 for another.
I don't judge people who choose to have large families. I judge my mother and my siblings but that's my prerogative. People can have the number of children they want and it's not the child's fault that bad decisions were made which resulted in their existence, so why should we punish that child and reduce their opportunities in life just to make a point?