An AI app for trauma survivors sounds superficially laudable, but I really hope they are working with seasoned professionals to avoid making things worse. Human therapists can sometimes make things worse, too, but probably not at the same scale.
It sounds like a dystopian horror to me
The dystopian horror is already here for a lot of people.
Most self-hosted services are generally a better idea, if you know what you're doing.
Personally I use Gemini sometimes to talk about my mood, didn't get a bad experience yet.