True I can play FO3 and never eat ... never. Just drink some purified water once in a while. Course I'm not sure I really want to start taking care of my PC like some SIMS character either. It's good to assume some things are just being taken care of.
But yeah, if food was actually useful in some way then crafting it would be nice. Similar situation in Skyrim with the cooking, except there are a couple items, like Venison Stew, which are actually overpowered as far as abilities given. Being able to perform power attacks over and over again after eating stew is a hell of a bonus. We just need more items that are in between being useless and overpowered.