And vaginas, and MRI machines, and hearts change dramatically every couple of years. Plus the human body grows new organs and limbs every few months and you're expected to immediately have 5 years experience with these new organs and limbs that have only existed for 2 months. Perfectly healthy suddenly people fall unconscious for no reason, despite all of their organs operating perfectly. When you check your human body documentation you discover that the lungs no longer work as of today, and you now need to use the sclurtleplussy instead. You have no idea what a sclurtleplussy, but you better figure it out immediately, or all these patients will die.