Why would it be inaccurate to say that Ellison presents a utopian view of African American life in invisible man?

I really do not think there is a black utopia here. The narrator plays the part of the tool or the puppet so many times that he is driven to bump strangers on the street, as in the case of the blond man, simply in order to recognize his own existence in their eyes. Yet, in the case of the blond man he fails as well and runs away in the dark as he will do time and time again during the novel. Symbolically he runs from boxing ring to boxing ring, beginning with the battle royal (in the first chapter) and continuing through to his fight with the blond man. His memory of the prizefighter against the yokel is an important allegory he provides. The narrator is the yokel in the narrative who is beaten round after round until he recognizes his ability to exist outside of the scientifically categorized world he lives within, most recognizably represented by the Brotherhood. The power structure then becomes more fluid and the yokel escapes his traditional role.