I agree with Twain about a lot of stuff. Unfortunately King is a bigger part of our culture than Twain also.
Part of the culture in the sense of ‘mass’ maybe. But King’s writing is never quoted nor has he created any indelible characters that live apart from the page the way that Tom Sawyer, Huck Finn or Elizabeth Bennett do.
And the King characters that people think of are actually distinct actors’ performances which depart from his arid texts considerably. Jack Nicholson in The Shining and so forth.