If artist cant make music when he is clear he shouldn't make music than or like most guys on party, they come and smoke too much or drink too much and that 'listen' music. But they dont know where they are and which music is.
IMO if you cant enjoy in some music or making it when you are clear you dont have to do that, then it seems you are doing that by force. That have some meaning like im doctor, but i can just heal my patients when im stoned or drunk, it's not healthy for anyone lol
I had problems because overdosing few times and really that isnt good think when you have brain damage or something like that, but fortunately, now im like before.
Now i dont need nothing really, but few beers and some smoke is good enough to keep positive vibes.
PS. Maybe you dont agree with me but thats truth, and if you cant enjoy in something so why you dont skip it?