@BillRM,
"I knew it all to" - In regards for that, I never claimed to know everything. I never claimed to know much of anything actually.
"that something is possible does not mean that it is likely" - As for this, that goes toward the 1% chance of having a baby that you so boldly made a large deal out of. If you're so interested in likelihood, then this conversation wouldn't be happening because you'd think 'it's not likely she's going to have a child, so saying anything is pointless', is it not?
My mother had a baby at age 17 and has lived a good life, and has also married the father of both of her children. They've been together for about 19 years now. It's possible to have a good life and finish education. I think a child would be a good incentive to continue education.
My mother wasn't harmed in any way. She chose that position, accepted the possibility, and also accepted the responsibility of her choice. She's very happy with her current mate, and if she had waited a few more years, perhaps she would have married and divorced with someone else. It's possible her mistake made her more happy in the end. I'm sure she'll agree that my brother and I were, maybe unplanned, but very much a large part of her life and she's thankful to have us.
I think encouraging her to use protection, choose for herself, and know the facts isn't insane. I'm not calling her choice smart or right, I'm simply saying it's her choice and you're not her parent.
She wouldn't be 15 when her child is born, but most likely 16. Either way, it doesn't ruin generations. It my financially strain, if she doesn't have the proper money (which, who knows, for all we know she could come from a wealthy family), but that's about all it will do. It'd be so easy for her to get schooled in the comfort of her home and take care of her child. The only thing her parents would have to do is help financially. By the time the child is two, she'll be old enough to move out and her parents won't have to support her any longer. Her parents may even be people who would be thrilled to have a grandchild. We know nothing about her, her life, or her family. It could be the opposite of what you are thinking.
You're taking everything at face value and distorting it into the worst possible scenario. She's a stranger and deserves the benefit of the doubt.