Exactly! All those things you said, take place that involve the pg are in the first 5 seconds of the possession, then turner is a wing. Assists and turnovers do not happen in the first 5 seconds of a possession and it's only about a 1/3 to 1/4 of the average possession. The part where you say it ends with him is just as important, he has more shot attempts than anyone else on the team, which indicates he doesn't play as a pg most of the possession, he doesn't rotate back for D, which indicates he doesn't play as a pg most of the possession, he attacks the boards after as shot, which indicates he doesn't play as a pg most of the possession, etc.
Also look at players who lead their team in assists, points, and rebounds... LeBron? Who by the way is similar height and style of play to ET, and is a SG/SF...