No.
What are you ultimately going for when you are playing guard? Just break posture? No. You want broken posture AND hip separation to isolate something. If your opponent's posture is broken but his hips are connected to yours and is crowding you, then yes, you can't really triangle him (or really do much of anything). Typically from the guard you want to break posture, THEN start creating space, and then you can attack your submission once you've created the space.
Break posture --> Hip escape --> Attack.