Quantity over quality can get you past the trap of rethinking your work before completion. It can also trap you into writing reams of useless material for its own sake. You can’t edit a blank page, but you do need potential for refinement. For that, you can harness the quantity beast by giving it a sense of direction.
So you want to write a story with a lot going on under the hood, from characters’ goals and frustrations to greater challenges of society. These varied pressures can create a desirably layered narrative. They can also explode into a scattershot mess – or intimidate you into fearing the rigors of development.