This is a good example of the difference between commercial veg' growers, and backyard growers such as myself.
A commercial grower would simply remove the head of this Calabrese plant, and ditch the rest.
However I wouldn't dream of doing such a thing as there are always secondary growths ready to be harvested.
You may have to enlarge the second picture to see what I mean, but there are at least four secondary growths which will easily make another couple of meals in a few days time. The commercial grower wouldn't be interested.
The global wastage must be enormous. Shame on them!