Is QE Really Powerful Money Printing?

Economists believe that interest rates are controlled. They're not independent, they're dependent on the short term rate. But history shows that's not the case at all. We've seen the financial market where long-term rates act independently because of different participants in the marketplace and competing views with the Federal Reserve or whoever's influencing the shortTerm Rate. I see central bankers and mainstream economics going too far into theory, and not being able to marry their theory with practice.