*sigh*
You're missing the point. There have been plenty of matches this season where we have depended almost wholly on attacking down the left with Baines, and after he arrived Pienaar. Although using them makes sense because they are two of our most creative players it also leads to our play becoming predictable.
It doesn't matter what team you are, or what players you have, the top sides _never_ simply attack down one side of the pitch.
Barcelona don't just win games because of Messi, Madrid don't just win games because of C.Ronaldo, and United don't just win games because of Rooney.
Baines is a top, TOP player and nobody is disputing that. What people are saying is that today and the game two weeks ago highlight that we can create chances and switch up our play effectively, it's now down to David Moyes to utilise all of our players and all of the pitch, rather than just passing it to Baines at every opportunity.