Mechanical Reincarnation, as the name implies, was a special technology that transformed humans into machines.
This technology was not only a crucial part of Dorothy's Creation of the World project but also a prerequisite technology that had to be developed before the final battle with the Calamity Beast Leviathan.
After all, the Witches needed to fight Leviathan after it had completely destroyed the world, which meant that by the time of the battle, the old world had already perished.
And feeble humans had no way to survive in such a thoroughly devastated world, let alone fight.
Flesh is weak; Mechanical Ascension.
In comparison to a mechanical body, the human body really had no advantages; humans needed to eat, breathe, and attend to their natural urgencies, and they were susceptible to cold and heat—essentially, the body was full of weaknesses.
