Can Rhetoric not be manipulating or are we always being Manipulated?

It's a strange thing to think about when we go through are day when we are asked to do something for a friend or a family member we are being manipulated because we don't have to do this at all. A great example is myself every time I am in the presence of my sister Alex she always ask me to do things for her like get her water, feed her dog, take him on walks, help her up and other things. Now do I feel like I'm being manipulated when she ask me to do these things no she's my sister she needs things and I help she is my sister. But it dose remind me of a famous quote from a video game that came out 12 years ago called Bioshock "A man chooses, a slave obeys." Its an interesting line of dialogue in the ending because you realize that you have been manipulated this whole time from the beginning of the game everything is set up so you can kill the antagonist Andrew Ryan the man who rules this underwater city Rapture. He keeps talking about the difference between a slave and a man and mentions something very familiar "Would you kindly....A powerful phrase.A familiar Phrase" Would you kindly is the same phrase that your only ally atlas states every time he wants you to do something. Then it all comes to you your own birth, your family, the plane crash it was all created by the other antagonist Frank Fontaine so he could control Rapture and sell his chemicals all across America. A simple phrase is manipulation even as simple as would you kindly.