You mean someone else could win the league with Arsenal under the current circumstances?
Current circumstances being?
Wenger:
Constantly developing young players
Sells them off whenever they reach their peak or close to it
Replaces them with 18 year olds
Overplay the ball, so they seem to dominate for long periods
Loves physically slight and generally soft players who struggle with the physical game and draw a lot of tackles and injuries
Doesn't spend any money on proven players even though he says every season that there is money available to spend
Has never brought in a good goalkeeper, see above