I just though of another analogy.

Software development is like a city planner with unlimited space.

The developers are also the construction workers that use cranes, trucks, and tools to build the buildings. But the problem is that they don't have time and leave a lot of equipment behind. Now there are finished buildings with cranes still assembled, cement trucks parked in the middle of the road, piles of dirt on the ground, and scaffolding everywhere.

Luckily space is unlimited so the developers build cat walks, helicopter pads, and bridges over obstructions. If city planners have a lot on their plate without random construction equipment laying around, imagine how hard it would be if they worked knowing construction a lot gets left behind.