I would imagine it is as follows:
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Come up with ideas or goal to accomplish /be given said goal
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spend large amount of time looking at existing code or prior implementation of your stated goal.
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attempt to write or import some code tailored to your specific needs
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test and identify problem areas
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find everything fails spectacularly and start over +/- tears.
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repeat until successful or dead
People think that the immune system is like this pinpoint accurate machine that kills invaders. In reality, it is more like a carpet bomber that functions under the principle that we can heal and viruses/bacteria cannot. Inflammation is basically your body carpet bombing and healing.
We would also not be able to build muscle mass as the repair of microtears is what leads to hypertrophy.
So we would all be dead. Healing if fundamental to life.