Peter Levine, in his book on p. 88 says,

...the time-honored expression, "time heals all wounds," simply does not apply to trauma.  In the short run, the suppression of immobility sensations appears (to our denial-biased mind) to keep the paralysis and helplessness at bay.  However, in time, it becomes apparent that evasive maneuvers are an abject failure.  This "sweeping under the run" not only prolongs the inevitable, it often makes the eventual encounter with immobility even more frightening.... If, ....one is able to utilize the vital assistance of titration and pendulation, one can touch gently and briefly into the deathlike void without coming undone.

Sometimes time isn't enough to heal. Sometimes a person needs a bio-mechanical change to break the cycle of dysfunction in the brain.  That's where chiropractic comes in!