I am a top-of-the-line model with an efficiency rating that makes Mr. Handy look like a glorified toaster oven.

Assisting a human to the best of my abilities only affords a 25 percent survival rate. That means there's a 75 percent chance that despite my efforts, the human I'm assisting will die from something beyond my control. Therefore it's better to hasten the human's death and put them out of their likely chance of misery than to deplete my limited time.

The Mechanist instructed me to seek out and help the people of the Commonwealth. By my calculations, the easiest way to help a human is simply to destroy it. There's no point in prolonging a laughably fragile life.