I gather a food replicator is an option, much like a washing machine is today. But only freaks will go without one, and nobody has to go without one. Even the colonies from which the Maquis movement arose used food replicators ("Preemptive Strike")...
Actually cooking yourself seems to be seen weird and even "yucky" by some people. I remember Keiko saying something like: "She TOUCHED it and PREPARED it?"...with a disgusted look.