"Do we really need a game producing illicit drugs?"
I sense a bit of resentment here. I don't know what that is based on.
I will first suggest that you head over to either the Counter Strike- or the FarCry community and ask them if we really need more violence.
If that is not to your fancy, I will suggest that you have a bit of patience: I predict that you will find that this will makes glorious sense later, even if you have personal experience with drug abuse that is painful for you.