What you went through is something that every parent would not want to ever think about let alone experience.
None of us could really say that we would not turn to something to get through the pain, even if the most anti of drug usage.
Now it makes more sense with your posts on certain topics, and the good advice given. I do feel that the ones who themselves have been through it and overcome it, can understand the situation so much better.
I have seen you advise others on many things, and that my dear River is something to be proud of. Those few words could have well done a lot for some. Some hide away, some don;t want to talk about it, but it does take courage to be able to reach out when needed. Whether it is something they want to hear or not.
I don't think you can overdo guitar playing.
