Totally agree with your logic.
I also thought that due to his rapid pace (he looks faster than walcott, easily) he could be effective up front and assumed hed be scoring more freely there (his record though is great).
However, ive been looking at his stats on and off and noticed that whenever hes played at left midfield or left wing he has scored close to a goal a game). However, at left forward, right or centrally i dont think he has ever scored a goal in Belgium or Turkey.
The problem with stats is that you dont see if a player has been switched over during a game for a short period so they may be incorrect.
However...based on the stats available, hes not been effective in assists or goals anywhere but from left midfield/wing.