How did you come to this conclusion?
Barkley was smaller than pretty much every power forward he played against, but a wider, stronger build than any small forward in the league. He often paired against centers, guards, and yes, 6'10" small forwards with great success. Incredibly agile and strong at the same time, Barkley dominated matchups against small forwards. Where in the world did you get this opinion because the film shows the opposite. As a matter of my own team, if I had the luxury of having another dominant power forward in my starting 5, I would definitely put Barkley in at small forward because he would dominate the opponent offensively and defensively.