Just knowing how to fight isn't always enough, but you're right. Life goes on.

[The assertion isn't very convincing, since Korra tends to wear her emotions on her sleeves. She just wonders how any bender could consider the prospect of losing their ability and not be horrified by the though of it. Maybe it's not so frightening for someone whose identity doesn't hinge on their bending.]

I don't just mean this situation in particular. Even knowing general stuff about what happens in the future might change something.