He isn't alone. He's simply the only member of the offense who has spoken publicly. The onus is on the players to execute. Smith doesn't want anyone to think the offense is trying to shirk that responsibility. His point is that what works best is what the team has practiced in training camp and during the pre-season.
Repetition is a key.
He said adding something in practice the week before a game increases the odds that mental errors and blown assignments will occur. What the Cowboys ran into was a wall of Giants defenders. Smith finished with 26 yards on 22 carries. But it's also a matter of selection. One of those times, I came to the sidelines and told backup quarterback Jason Garrett we need to run on first down.