Running for office is little more than being a top salesman. Acquiring market share. Convincing enough people that you will give them more of what they want.
Trump is a professional salesman. He has no policy positions other than what his instinct tells him will sell to a lot of people. The difference between running for president and running his "businesses" is that to become president you need to get a majority of the market share.
Clinton is a less accomplished salesman, and I believe she has some real policy positions. But I also believe that she cannot win unless she panders judiciously to acquire the majority market share.
The other side of the equation is that people want to be sold something. Otherwise, salesmen wouldn't exist. Unfortunately, the majority of the market share does not have much in the way of common sense when it comes to buying.