Jacksl, if you are talking about the 15 year-old mum, I agree to a certain extent. However when her mother had a baby at 15 she she coped really well, with family support. She had a very close bond with her daughter, moved into her own place at 18 and became a fantastic mum. Once her child was old enough she 'went back to school' and ended up with a degree.
She was disappointed that her daughter didn't learn from her mistakes, but the child had had such a good relationship with her mum that I honestly don't think that she saw being a teenage mum as a problem, and has also made a great job of bringing her child up.
While I admit that having children at a very young age isn't ideal, by any means, it also means that you are young enough to go out and enjoy life when the child becomes independent.
I have always said that there are far worse things that can happen in life than having a baby. That was my mantra when I became pregnant with my 5th child at the age of 38, just as my husband was advised to give up work on health grounds! We survived!