Agreed, but my point wasn't about Dean's character motivation. I've already said that I think the writers have made that believable to the best of their ability. I'm talking about the show as a fictional construct in which Jack has always been, and still is being, framed and played as a child, with Sam and Dean having been framed as his parents. And I'm saying that to now have them actually use their parental status as a tool to trick Jack into the box is a horrible premise to ask the audience to accept. Apologies if I'm not making myself clear.