Many artist in rock who are famous for their so called 'drug use'
like for example the rolling stones acknowledged that their best albums were made in sober periods.
Afterwards playing them live on drugs may have been lot's of joy.
But producing/writing at such a level, it seems impossible.
They are artist, who claimed to have made their album pure on drugs, but often those artist do not produce a second album that's is as good as the previous.
It's more like a 'lucky shot'. The right time and drugs can give the opportunity. I believe that. But it's still "one" lucky shot.