some people think just blood/nudity toggle could make big difference and well it probably would for them.
Precisely. It would make a difference for them. Unfortunately we do not posses a set of perfect moral axioms that could define what is and what is not appropriate for children.
In the village I come from it is normal for 10 year olds to drive 20 ton tractors. The law disagrees, many people disagree but no one here seem to see a problem with it.