Unless you have certain markdowns or produce which requires looking up a product code.
I get the markdowns on the self-checkout, provided I enter my store account number (same as tel no., so pretty easy to remember), and the self-checkout pad has the exact same digital lookup that the staffed aisles have - all produce is indexed by description/name, with an image to go along with it - if the produce sku is not on a sticker attached to the produce itself.
I have never had to go back to the shelves to look up a sku for produce, but I have several times had to explain to the numbskull at the staffed register what the produce was, and even how it was spelled, so he or she could find it on the self-same digital lookup system I can use myself at the self-checkout.