> That's just farmed blueberries.

No, it's a different species, vaccinium corymbosum. It's farmed, because it can be farmed, because of the bush size and growing conditions.

Wild European blueberries, vaccinium myrtillus, can't be farmed. If we could, we would, but we can't, so instead we employ hordes of seasonal workers to go out in the forests and harvest them during the month-long season.