Well, even if you can do something by hand, there's a market for a gadget that will do it more conveniently. There is a market for food processors and rice cookers. I don't think Juicero is a good example of "stupid money" craze. Theranos is.
Were that the case. But squeezing the juice out of the packet was far easier and quicker than putting it in the machine letting it get scanned, phone home, and then slowly squeeze the bag.
