PTSD is also lumped in with shell shock, a jarring of the braincase after explosions (usually during a war) with physical damage. It's unthinkable to me they lump it in with mental problems.
George Carlin skit. https://youtu.be/hSp8IyaKCs0
George Carlin skit. https://youtu.be/hSp8IyaKCs0
I recall the bit well, and being struck as much by its insistence on direct and meaningful language as by the fierce sort of kindness he made evident in its ending. Carlin was and is a treasure. But if I get treated for PTSD when what I have is CTE or vice versa, I probably won't do so well. In that sense, the more specific modern terms do have value, jargon though they also be.