This is absolutely true, but for non-perishable items, even normal consumers can sometimes want to buy in bulk. I routinely get paper goods from restaurant supply stores, for example, because I have the space to stock up and store them, and because I'd rather stock up on a ton of paper goods every once in a blue moon than buy in more normal amounts and be caught unaware when something happens and I run out because I went through more paper towels than I was expecting. Also, groups of friends can definitely go in for single bulk purchases at these sorts of places, and if you're just starting out and know a lot of other young people in a similar situation, a small buying group for something like basic kitchen gear, plates, and silverware can work out really well.