We're pretty far from the original topic here, but Fiendlover brings up a very unique perspective - that of those who are affected.
And that makes me ask - what is the adult equivalent? Is there one and should there be one? We are basically talking about either time or a well rounded person, so do adults have an equivalent standard - or should they?
I think there is an adult equivalent; it's just more draconian.
An adult either tends to their responsibilities outside of the school, or they can't pay the bills. Or they suffer through divorce. Or otherwise feel the repercussions in their life.
Adults and kids aren't the same. And they don't have the same responsibilities. After a certain point -- we have to accept an adult will handle their own balance of responsibilities.