For me it's not just about having stocks of food (though it's partially that). But, if I have plenty of stock in, then I don't have to buy many of my usual things. That leaves money in the budget to absorb price rises on other items as I won't have to buy tuna, kidney beans, oils, chopped tomatoes, flour, baked beans etc.
About 4/5 of our food is fresh, so we'll have to adapt. But if we can give the kids as normal a diet as possible, then I'll be happier.