First of all, I think this section articulates stated law. Since Regina v. D.B., that is the prevailing principle of fundamental justice that applies to the youth system. Whether it's in there or not, it would be the prevailing framework under which youth justice would be conducted.
We are learning more and more about the cognitive capacities and development of young people and some of the cognitive impairments that affect young people's perception of causality. For example, fetal alcohol spectrum disorder is a major problem in terms of how young people understand the consequences of their actions and it does affect things such as administration of justice breaches. If you impose a lot of conditions on young people who don't understand causality, they're going to breach those conditions and you're going to end up exacerbating the criminal justice response because you didn't understand the limits of their cognitive incapacities.
I think there is a lot of reason for understanding this better, so that the justice system is fairer and more effective.