Um no there's a difference between Batman's grappling hook and Katana's sword
They mentioned the sword and its ability twice implying that it would be important later. Nobody points out Batman's grappling hook or gives it a backstory like the soul of her husband is inside of it like the sword. There isn't a "that grappling hook belonged to Batman's father" line in Batman making it important.
Katana' sword cut through magical limbs and skin. There's pay off.