Did you suppose that a teenager who hasn't even graduated high school yet is in a good position to take on the full responsibility of parenting?
That depends on the person. While you are perfectly fine making assumptions about this particular individual, I ask you to consider that perhaps you don't know this individual and not everyone conforms to your generalizations. I knew women in my high school that were perfectly capable in raising children, but I also recognize that it's not the norm.
Have you seen the statistics for children (especially boys) who are raised by such people?
It's not clear to me who you mean by 'such people'. Do you mean fathers that would do what the father in the anecdote did? Do you mean people like me that recognize that not everyone conforms to my worldview and it's sort of arrogant to assume everyone does? Remember, you don't know this girl like you might know your daughter(s), if any.
Do you think that's the ideal environment for the child?
That would depend on the child.
Or do you think she just wanted to get her rocks off and didn't consider pregnancy?
I don't know her and I'm not comfortable assuming I know her motivations due to statistics. That gets into really scary territory.
Oh, and a responsible father would think of these things even if the mother didn't. This isn't a responsible father. This is a horny teenager who wanted to get his rocks off too. It's so bleedin' obvious, it's as though none of you were ever in high school...
You are saying that her father is a horny teenager?! I don't understand that logic, sorry. I've been to high school and there were all sorts of people there, from the irresponsible horny teenager to the multi-millionaire self-made business-women at 17.
Other than this phony sense of "I'm offended by your certainty!" there is no good reason I should have to explain this.
I am offended by your certainty because that's the kind of reasoning that says "well, she's Asian, she's 17, she lives in Burbank, she drives a BMW, hence she is X, Y, and Z for certain because statistically that's most likely". Let people be themselves, not a statistic.
If you really, really love your children, then you prepare as best as you can to provide them a quality upbringing. This person could do better, if only it were important enough to her.
I don't have any children.