I think the bigger surprise is that Wiggins is part of the highest scoring pair. But this is based on total points, Wiggins played 71 games and was 25th in total points in the league (Curry was 1st). Per game, Wiggins was 39th.
Per game, Beal + Westbrook were top at 53.5, Brown + Tatum 51.1, and Curry + Wiggins 50.8.
I guess this just shows that wins is about more than scoring.