Ok, I've actually seen that in the past.
I agree it IS one workflow and is a likely real world example.
But, it is certainly not the only workflow.
Not all design of sheet metal enclosures involves starting with a flat piece of sheet metal. In many situations, when modeling a , it is far easier to build a lump around the object to be enclosed, make the lump a shell, add holes for protrusions (shafts, connectors, etc.), put reliefs & gaps in the appropriate corners, add bends, then flatten to create a pattern, generate Gcode to sent to the CNC stamping department.
Not that hole location can't be done with either workflow, but it's much easier to figure out where holes go while it's still in the folded state with things protruding an alignments visible and less prone to error.