I worked for 20 years with veterans suffering from PTSD. A majority of them used marijuana regularly, even daily. After years of use in some cases they still ended up needing intensive hospital treatment. If marijuana was useful for PTSD I would have needed a different job. The trap of using marijuana, alcohol or other addictive behaviors is, the very thing destroying you is what you have come to rely on to get through the day. A solution, it ain’t.
I know retired vets who use it daily. They have a medical card for it. They function fine. They have an RV and vacation places. That’s their story. I’m not a stoner. Don’t care for it but my libertarian tendencies says let each person decide for themselves.