Perhaps, but the rewards these quests usually yield are new supplies entirely. They're not always very useful, though.

[ There is one quest they can do, but Akechi isn't about to go risk his neck in the woods with someone he's just barely met. What if he's completely useless? ]

It is true that colorless food won't taste much better than ash, but that quest isn't quite news to us. Usually what happens when someone loses their color is that they'll lose their emotions for some time.

[ Casually talking about this like it hadn't happened to him, yup. ]