His complaint isn't that Jobs was good at it. His complaint is that Jobs sells computers that restrict users freedoms to use their own hardware as they see fit, with their own software or software of their choice. He merely complains about Jobs being good at it because that helps convince users to use machines that otherwise restrict their freedom.

The thing is, a lot of people are willing to trade their freedom for a little convenience, especially if that freedom seems abstract and the convenience is immediate. But if enough people do that, you can run into serious trouble.