I think a major player in this problem is the general lack of education regarding the differences between PTSD, ASD (Acute Stress Disorder) and normal human reactions to unfortunate events.
Grieving is a natural human process resulting from a profound loss (not just deaths), and the effects of grief can be felt for a year or more. This is not PTSD. Along the same lines, survivor's guilt is also not PTSD.
ASD is a normal reaction of high stress symptoms following an abnormal, stressful event ("trauma") that starts immediately after the event has occurred lasts no more than 30 days. This is not PTSD.
Being wary of a specific piece of rode after a bad car accident, temporarily preferring to stick to the side lines rather than being in the middle of the game after being hit in the head with a ball or puck, worrying about the fidelity of a new partner after being cheated on by a previous partner, etc. are all normal human reactions to unfortunate events.
All of these are understandable. All of them feel bad. All of them deserve sympathy. But again, these are not PTSD. Unfortunately, far too many people in positions of trust and high regard do not understand the difference.