The idea of "obedience" in relation to God is blind submission motivated by threats and fear. I am sure we both agree threats of violence and fear-mongering are not proper methods of child raring.
If a 12 year old wants to "diddle" his younger sibling, obedience is definitely not the issue. It is probably something more serious that requires professional help.
Generally speaking, "obeduence" is a word with awful conntations to me. In relation to parenting it reminds me of the style from the previous ce tury. But, it could be used in a more colloquial way too like in "Zoe is being disobedient when she jumps on the bed at bedtime" and in that sense, "obedience" is what parenting is about. I guess.