I mean...humans do take care of themselves. They can tell you with their words when you've poured too much water on them. They won't abruptly die on you, and even if they do, it probably won't be your fault! Yes, people sound like great company! But...hmmm, what if they don't like you? What if they use their words to say something mean to you?? Okay, no, never mind...you're sticking to plants. Much safer.