There's a popular saying that goes, "If you're in a hole, stop digging."
My question is: What if you're not done yet? Say you've only dug down about a foot, but you need to dig deeper to complete your task. What do you do then? Should you stop anyway and call it done?
I can tell you from my experience in the home building business that if people adhered to this adage, it would bring the excavation industry, let alone the entire construction industry, to its knees. It's utter madness.
I suppose you could dig from outside of the hole, but a lot of times that's inefficient and can add a lot of time and cost to the project.
Now, if "hole" and "digging" are merely metaphors, well, that's a different story.