If a songwriter has done it, why not a scriptwriter o screenwriter.
The other aspect is the for whatever reason there simply is no culture as it were around reading movie scripts, the way there is around reading plays or even song lyrics.
It may (presently) be inappropriate to compare him to Tolstoy (a towering figure in literature) though it must be said that the novel, at one time, was considered a low status medium compared to epic poetry and Greek theatre.