Ive was not unilaterally responsible for deciding what constitutes a MacBook Pro or frankly any of the products Apple created. And he never dictated anything to anyone other than the Design team he managed.
Major product decisions are always made across many parts of the company e.g. Product Marketing, Design, Hardware Engineering, Operations etc and are signed off by the Senior Leadership Team.
MacBook Pro is a critical product for the company and the idea that one person is simply making all the decisions is just laughable.
You should look up what Product Marketing is because out of anyone they are far more responsible for what features go into a product.
And you were talking about product features e.g. TouchBar and ports. Those definitely aren't the sole decisions of the Design team.