It's one thing to say you wouldn't judge/ ostracise a 14yr old mum, but a bit of a leap to pretend it's a perfectly good age to be a parent.
Of course you can still achieve when you become a parent that young, but it's ludicrous to suggest it won't be so much harder. And I also personally think that unless they have amazing support, they don't achieve the same by 30/40 as they might if they weren't a parent, even if it levels out after that.
I did a ft degree, worked pt and lone parented a baby/ toddler without any back up or support. Could I have done a medical degree or anything else that challenged me and required full commitment alongside financially and practically raising a child and running a home? Could I fuck.
Same goes for anything else you do as a teen parent, you need a lot of effort for the same outcome you could have breezed without a child.
Lots of mums who were in their teens, and those like me who were barely out of them will be in the same place by their 50's as they would if they'd waited till 30 to be a parent. But there's also the group who needed all their time and effort just to get GCSEs, or to get a half decent job, or even just to work shifts in the nearest factory, who couldn't achieve previously realistic goals when they became parents very young and never catch up.