Welcome Mariel.
I'm the mom of a 23 yo AS who was just sentenced to prison. He has been bailed out many times in the past and had probation (I agree they drop the ball on requiring treatment!) While he was in jail awaiting sentencing the last few months, we have had some of the best conversations of long time. Most likely because he is finally sober! One thing he told me is that he is relieved to take responsibility and pay for his behavior, as he had been rescued and gotten off easy so many times.
So, maybe this is the road he needed to travel to get to the place of recovery? Only time will tell. I also have known parents who have struggled their whole lives with children who never get sober. I choose not to focus on that, trying to live in the moment. I also choose not to live in misery over my son's path in life. Most days, I can live up to that choice.
Wishing you the best. Read as much as you can, and I also recommend NarAnon/AlAnon. It saved my life when I was at my darkest point.
Hugs,
40 Thieves