That's really not true. Imperfect food is generally not sent to the supermarket. Imperfect apples become applesauce. Imperfect cucumbers become relish or pickle slices. Imperfect tomatoes become ketchup.
While you're not incorrect, there's a whole slew of the 'on the fence' produce that DOES get sent to supermarkets, and then don't get sold. There's been a few documentaries about it, well worth a watch.