Be able to fill up the map completely (sometimes we forget and we dont just want to create a whole new world just to get a full map)
Crafting and compatibility, you cannot craft not even with creative mode, you can build but not craft for free as you will still need resources, and it doesnt have compatibility on upgrades for RV interiors, and why do we need crafting if we can just spawn the items? because some mods like solar panel mods or steam generator has to be crafted on the inventory and automatically places.