That's not what you said, you were repeating BAD INFO. All the SSRIs that the FAA will issue SIs for have ON LABEL use for things other than depression. Fluoxetine (Prozac) is on-able for OCD, bulimia, and panic disorders. Sertraline (Zoloft) is on-label for OCD, panic and anxiety disorders, PTSD, and PMDD. Escitalopram (Lexapro) is on-label for generalized anxiety disorder. Paroxetine (Paxil) is not eligible for the SI, but is also used on-label for OCD, anxiety, PTSD, PMDD, and in some formulations hot flashes menopause.
It's quite obvious that SSSI have FDA approved and medically accepted uses other than depression. There are some SSRIs (Citalopram) where that there is no on-label use other than depression, but that's NOT what you said. There are also SSTIs that aren't on-label for depression at all (Fluvoxamine is one).