Why is 殺す such a common example verb on Yokubi?

It seems pretty weird to have kill be such a common example verb. In one lesson it gives the example

殺してあげる

I’ll do you the favor of killing you

This is also just a strange sentence to use as an example. It doesn't make much sense to me why it is being used here.

EDIT: I guess this is a remnant of being a successor to Sakubi, which also uses 殺す very frequently. But that still makes me ask why?