A counter-example - with a weekly shopping list way too long (family of 4), its hard for the husband to pick up all items as fresh as possible and do all necessary checks on each of them. Or in other words - even people themselves do make same mistake, I certainly do.

People will forgive themselves for saving money, but will not forgive others at the delivery service for charging extra.

There is no delivery service that's cheaper and good enough, or dirt cheap and expected to be awful, but those are large profitable retail operations. The only sector offered is more expensive, which annoys people if they occasionally get a below average item while also paying a lot more.

Delivery is for people who buy tenderloin not ground chuck and they get MAD when their tenderloin isn't perfect.