Though what the stole seems silly and you wonder why someone would steal items like that it makes perfect sense to me.
Items like that can be sold to mom and pop convenience stores and haji marts who will then resell them with their merchandise obtained from regular vendors. This sort of activity is not just random thievery but an ongoing criminal enterprise. Professional shoplifting rings do this type of theft/sell/resale to the tune of billions of dollars in lost merchandise to legitimate retailers every year. The markups on some items are huge just to account for the theft, condoms are a great example, a $4 box of 3 condoms costs the retailer about $1.25 but 300% markup is there to cover the massive amount of loss incurred on that item. So next time you go into Walgreens for a box of rubbers and have to have the clerk unlock the case for you, these people are why.