I agree, but for some reason there's huge mental inertia to the foods we eat day to day.

Paying more for staples that you've eaten your whole life (especially in a boiled frog way) is much more time/energy/mentally cheaper than experimenting with how you and your kids might like a bowl of oatmeal prepared.

That said, if you're having trouble making ends meet and you have kids, you don't have much of a choice.