The thought, clearly expressed in Elizabeth Warren's post, is that Amazon et al are stifling innovation by discouraging entrants and using dominant positions in adjacent industries to crowd out competitors. This isn't a new idea—it's one of the pillars of antitrust.
They're not stifling innovation. Their successes have had massive spillover effects helping other companies to innovate. The Golden Goose is still laying eggs.
This isn't Standard Oil. It's not Ma Bell. When they stop innovating and start extracting rents we can have a reasonable conversation about breaking them up.
All I can say is that a lot of people disagree with you. If you're interested in that perspective, a good book is "World Without Mind" by Franklin Foer.
