Many people nod along until they hear that nursing to stop a child from crying is also short-circuiting the healing. After all, nursing is part nourishment, part comfort. However, putting a breast in a baby's mouth when she is crying because (unbeknowst to anyone) the way her blankets are wrapped around her legs is bringing up the scary sensations she experienced during birth, causes her to stop offloading the feelings. On the other hand, if her mother would hold her in arms, soothingly reminding her that she is safe, that it's okay to let out all her fears and cry, she would work through and be able to see that this situation, though reminiscent of a scary situation, isn't dangerous. And moreover, that it is safe to have scary feelings and let them out. No need to push them down, run from them, or be threatened by uncomfortable feelings.
M&Mmommy, I did like your story about how your own DC needed this outlet (and then age to verbally express it and process it). But I hope you meant it as a story about YOUR babe, not a policy other mothers should follow. Each babe is different. Some may need this outlet. Many others may not.