Not only that, but many times people don't know what they want until you tell them about it. I used to sell debt collection services, and now in my spare time I sell my books, two very different products, but you sell them in fundamentally the same way. Someone has a desire that is not being fulfilled, sometimes they can't even put their finger on what that desire is, but when you explain what it is you have to offer, you see their eyes light up as they think, "Yes, that can help satisfy me." No trickery or browbeating required.
Or they shrug their shoulders and walk away, because it doesn't satisfy their desires. If only marketing was as powerful as these leftists claim! I'd be relaxing on a tropical beach now instead of sitting in my office, typing comments on Steemit!