One of the great cruelties of going to a large store is that there are often so many items in there that you can't actually find what you're looking for. It's a classic case of not being able to see the wood for the trees, and we've all experienced it more than once. We know the embarrassment of calling over a member of staff and asking where to find something, only to have them point it out right in front of our eyes.
By the looks of things, all this shopper wanted to do was find an accessory for their iPhone. They weren't prepared to be confronted by an entire wall of iPhone accessories, and it's simply more than they can deal with right now. Their brain has shut down, and they're just going to have a rest, allow their mind to recharge, and then wake up and try again. In the meantime, picking items off the bottom row might be a difficult task for other shoppers.