You made a good decision, staying away from drugs, since they must be supplied under strict medical supervision, from specialists or people who are very experienced in it (I am part of the third group, "the veterans"). I can imagine what it means to your friends and family not being able to communicate with you, it caused them a lot of stress.
The important thing about that teaching is that you learned that with drugs you not only harm yourself, but you harm other people, so I think the lesson was very clear to you, and I congratulate you for that.
Don't take drugs, just eat one !PIZZA
I agree with you. Drugs can be good and bad to us at the same time. We just need to take care.