Eh, the point is avoid unnecessary work. If you have just one diagram, creating it by hand is not a problem. If you have 10 or 20, you want automation. Especial

Eh, the point is avoid unnecessary work. If you have just one diagram, creating it by hand is not a problem. If you have 10 or 20, you want automation. Especially since you'll want to keep the diagram continually updated, maybe tweakable with different styles; editing all diagrams by hand every time for every colour change is arduous compared to just running a single command to re-render.