Babies Having Babies?

Why is it the parent's fault? Teen girls can't think for themselves? I am so sick of people blaming someone else for their mistakes--it is just always someone else's fault? My best friend had her baby at 17. She was a straight A student, Honor society, on her way to college, did sports, extra curriculars, had a job, etc. She had a great relationship with her parents and they knew pretty much everything that went on her life and had no reason not to trust her. She screwed up. She knows that. She dumped her boyfriend after their daughter was born because he didn't want anything to do with the baby. She's almost 25 now and she is a great mother. Better then me, that's for sure. She is a teacher and going back to school to get her Master's degree.