Link nods, because Id's right. He is efficient at this. He's certainly gotten the practice in to make him so.

"Always pick up what might be useful," he says solemnly, as he stuffs another mushroom into the bag. And also a small lizard that was just minding it's own business nearly. Apparently Link also classifies that as something that 'might be useful'.

There might be a reason he usually needs to carry around a korok-enchanted pack to store all of his things.