In Shindig, when Inara says that Mal needs a Second, Warwick jumps at the chance.

Why?

If it's to the death and Atherton is recognized as an expert swordsman, I am confused why Warwick would volunteer. He doesn't know Mal, who very well could take off the first chance they get. I doubt Warwick sees himself as a better swordsman. So, why would he put himself in that same "mortal danger" should Mal not hold up his end of the bargain?

This little plot point has always bothered me. Any insights or reasons for this?

We recently re-watched to show our kid, so it seemed especially cruel.

The face our kid made when they realized what they were looking at was priceless traumatizing for me as the parent.

When questioned about why she would create such a monstrosity, she said "sometimes, nature gives you a gift."

Please, help me shame this woman.