Childhood's End is forced to compress the timeframe of the story in order to keep our characters around for a while - an issue the novel has no interest in.
I thought it might turn into a way of finding redemption along the way - an alternative to self-abuse and violence - but it seems Jessica Jones is about subverting that idea as well.
The way Jessica Jones subverts what we've been trained to expect from a confrontation like this helps to establish a more powerful and mature psychological playing field.
If anyone anywhere ever had any doubts about whether or not Bruce Campbell was born to play Ash, all they need to do is sit down and watch Ash vs Evil Dead.