That bugs me too. I hate to write off kids as unredeemable. I do believe they need to be punished and severely. But this feels like we're throwing them away almost. I wish there was a different solution.
What also bugs me, is life sentences aren't always for life. I can't imagine what it might be like for some 50 or 60 year old to be released after a being in prision since s/he was a child, who has absolutely no real world experience in anything. For them and us.
The whole thing is just sad.