@Sighs - I hear what you're saying. For me, this is actually more about accountability in diagnosing people. PTSD seems to be a preferable option (probably for many reasons) to other diagnoses.
If a person presents to a doctor and says "my husband died", there is no doubt in my mind that the person is suffering, legitimately. Real, genuine suffering. There is also no doubt in my mind that the person may have mental health symptoms requiring treatment as a result.
The important thing in my mind is getting that person diagnosed correctly, so that they can be treated correctly. In my mind, I remove the question of "better or worse" suffering.
But what I do ask is "what mental illness does this person actually have?" Maybe it's ptsd because they saw their husband shot in an armed robbery AND they have symptoms consistent with ptsd. Or maybe they watched their 80 year old husband slowly die of Parkinsons and they present with all of the symptoms of depression.
The importance is calling for more accountability in diagnosis. A massive trauma, like Criteria A, sets in motion particular symptoms. We know this. That's ptsd. The value in this exercise is requiring the doctor to actually look closer at the clinical presentation before them - sometimes that means telling a person that no, it's not ptsd, it's "something else".
There seems to be some fear in some quarters about losing the ptsd diagnosis, and being disgnosed with "something else". But that is not saying "you're not suffering enough", it's just saying "you're experiencing something else...it's not the same, it's different."
Maybe the "something else" is not as palatable for some reason. Maybe doctors don't want to tell patients it's "something else" so they reach for ptsd. Either way, in my mind, everyone benefits from an accurate diagnosis.