There are plenty of kids out there who don't kill someone. I have worked with them and a lot of them don't even think of killing someone.
And if, at 14, one of them had come to you saying they wanted to have a baby, take out a loan for a house, and get a job operating dangerous heavy machinery, you would say.....?
In fact, let's explore that some more. Same kid is told no, goes out and murders someone, gets charged as an adult, gets off on a technicality, could they now do all the things they wanted to do?