Not at all. PhantomWolf was referring to the writers of Sesame Street, not some mythical Creator.
I think it's a pretty well established fact that Sesame Street has writers (and a creator. Who is a dead guy with a beard and who is worshipped by many, go figure).
Now if you'd want to argue the principle of
'death of the author' and say we can only deduce meaning from the material itself and not from the intentions of its creator, that's another discussion. But I think it's safe to say Sesame Street has creators. (Of course it also 'evolved' over the years

)