That does seem silly though. There's no "skill" in building a Lego model faithfully by the instructions. OTOH, you do get into a grey area with customizations

That does seem silly though. There's no "skill" in building a Lego model faithfully by the instructions. OTOH, you do get into a grey area with customizations... like if someone buys two Fire Brigades, and builds them into a Super Fire Brigade, that's going to be "custom" but a lot easier than starting from a pile of bricks.