Right on. A legitimate use, and one I can support. I have NO quarrel with drugs properly used when necessary (I use some myself -- prescriptions, I mean).
But it's my feeling that my memories are MINE, and they help very much to define who I am. There are other ways of dealing with PTSD than drugging it, healthier ways, ways that don't screw with your memories.
It comes as a shock to some physicians that medical school doesn't even make them infallible, much less even a minor deity. Good physicians learn that quickly and never forget it. As for the others...well....