Actually, the friend might have a point though. Spending that much on groceries could mean you're buying a lot of processed stuff or wasting food, which isn't great. It's not just about saving cash, it's about being smart with what you buy. Maybe they were trying to give a helpful nudge to check your habits. Saving money is good, but how you save it matters too.
My neighbor once spent $200 on organic kale because she thought it'd make her "feel better." Ended up rotting in the fridge while she ordered takeout three nights in a row. Sometimes saving money is just about not buying things you won't use, not what's on the receipt. But hey, if the shopping list works, don't overthink it.