I'll add my hypothesis to the mix: Adult dramas can create layered emotional conflicts without needing characters to physically fight. Kids have smaller attenti

I'll add my hypothesis to the mix: Adult dramas can create layered emotional conflicts without needing characters to physically fight. Kids have smaller attention spans and a poorer ability to grasp emotional nuance, so cartoon writers have to create simple conflicts: Good versus evil, good guy fights bad guy. And with fighting comes more death.