Why do a lot of Christian TV preachers sound like motivational speakers?

Preachers are BS artists. They have practiced speaking and studied the Christian bible. They prey on people's decency, vulnerability and gullibility. MOST preachers are full of it. You can't trust two words that come out of their mouths. Go to God yourself for answers. You're supposed to pay full attention on the earth. You can't rely on preachers to tell you about God or anything else for that matter.