I’d be more concerned about water TBH. Most of us carry a fair amount of fat, enough to survive several weeks without eating. Having rations available extends that timeline a lot. But without drinking water, that’s all moot, since you can’t survive long without that.

Really depends on your timelines. Prep for short-term disaster scenarios on a 1-2 week timelines should be manageable for most, and really we should all be doing it. Prep for longer timelines is much harder.