Both. Same goes for all psychological disorders. From the perspective of enlightenment, ego IS a psychological disorder. Autism, ADHD, PTSD, multiple personality disorder, anxiety and depression are all manifestation of the ego. Even insomnia and migraines are. At some point of time, before the prohibition, it was widely thought that psychedelics for psychiatry is like penecilin for general medicine, and this assessment was more or less correct. Both psychedelics and meditation have provable permanent positive effect on most mental illness conditions.

I am speaking from both science and experience - I suffered through depressions, DPSD (delayed phase sleep disorder) and migraines all my life. It’s all gone without a trace. I would have never believed it was even possible.