I just watched a couple vids of that play.
If you're interested, take a peak. Focus on Turpin and Dak. Watch how Dak takes the snap, drops back while under no pressure, taps the ball then throws.
While this was going on, Turpin came off the line had a good deal of open space around him as he moved to his spot, then, as the defenders converged, taking away what space he did have, Dak finally let the ball go. Zero space to even try and make a move, Easy tackle. Game over.
Dak single handedly turned a low percentage play into a no percentage play by not quickly getting the ball out to Turpin with a little space to do what he does best. Dak didn't have to move an inch after taking the snap. He could have and should have taken the snap, counted one Mississippi and let it go to Turpin.
Very unlikely the play wins the game, but it at least gives a chance AND we go down fighting instead of lay down looking like a bunch of chumps.
That was quintessential Dak.