It wasn't that long ago that 8th grade was the last year of schooling for most adults in America. The coming of age in America today is postponed far beyond that of most other cultures. Because of this we have a contrived layer of conflict occurring in the Boy Scouting years.
If a parent hasn't taught their child well enough by the time they turn 12-13, they have pretty much missed their opportunity. Dictating priority policies at that point will be met with rolled eyes and faked enthusiasm at best.
By the way, this has nothing to do with Scout leaders and whether they are right or wrong. This is just the hand we as teachers, cleargy, scouters, etc. are dealt when dealing with this age group of adults who are not recognized as such by the culture.