I think it depends on the component, I find it extremely useful for example, when assembling a board to see which pin a particular function of a transistor is on, I can tell pin 1 from the package itself, but not necessarily which one is the "collector" unless I look up the datasheet, if the pin numbering is on the schematic, which I usually have in front of me, not the layout artwork, I can use it as a quick reference.
Works for me!