Hi Worried, people end up going to rehab for all sorts of reasons. My son has been in rehab multiple times.....and I think it always helps, at least it gives them some time to clear their head and think about what they really want in their future.
I think it is important for you to realize this path of recovery is a journey.... It is usually not a one shot deal. So your hope I am sure is that this rehab is it, this is going to be it, he will get clean, stay clean and go on with is productive life. It may not happen that way.... Like I said it is a journey often with missteps along the way and that is ok. The important thing is that he has started on this journey and that is good no matter what his initial motivations are.