maybe but you get the recurrence of episodes from holinshed in the plays, and as I remember from classical texts. And aren't there supposed to be echoes of Seneca in Clarence's and Hasting's speeches before execution in Richard 3.

Why does Shakespeare have to be one thing or the other though.

Take some phenomena like the Beatles. Its very hard to work out where the precise magic was located. Perhaps from a good working class second generation muso like Macca. Perhaps from the poetic urges within the breast of an alienated misfit like Lennon. A truly gifted and divergent thinker on lead guitar like George. Perhaps we are too close historically to work out exactly what happened - certainly nobody has been able to duplicate it since.

Shakespeare is just bloody good fun in the theatre. if it weren't - it would have been forgotten - how ever marvelous the component parts.