YANBU. I think a big problem is that wages are so low that it's almost impossible to rent a place on one income if you're on minimum wage. If you're on a zero hours contract you're completely fucked. When I was single on NMW I couldn't afford to rent a flat with bills and run a car, so I had to live in a house share. That's fine without kids, but I realised if I'd had a child I'd have been completely screwed. And I live up north in a very cheap cost of living area.
So you're in a relationship, you split, you're now a single parent. You work a bog standard NMW job, say as a cleaner. On your wage you can't afford to rent a two bed place for you and the child. And even if you earn more, how on earth do you pay for childcare on top?
So I can totally see why people rush, I see people referring to a boyfriend they've dated for two months as 'my new partner' when they've known each other five minutes. If you can't afford to support yourself it's human nature to want to team up with someone else, after all one of the main points of a relationship is to share resources. Unfortunately rushing into things often leads to further problems. New partner you barelf know, moving in fast and emotionally damaging the kids as a result, have a new baby to 'finish the family' when you didn't know one another well enough, then you split when you realise it was too soon and you barely know them and now you have doubled your problem. Rinse and repeat.
I feel the answer lies in a) higher wages so you can support yourself on minimum wage b) subsidised childcare for working parents so they can participate in the workplace asap and have better chance of supporting themselves c) rent control, so landlords can't get away with all the shit they currently do and d) education on relationships and healthy partnerships in school and college, to give kids a chance of understanding what it looks like to have a healthy relationship, to get to know someone before having a child, to ensure you are in a financially stable position before a baby, the effect on children of constantly changing home circumstances, new step parents and step siblings if it isn't handled properly and given adequate time for adjustment. And of course, easily accessible free contraception.