I don't think the written word is important in movies anymore and the really great movies are done by great directors who in many cases write their own scripts. I think it's gotten to be more of a visual thing than an audible thing.
Sometimes writers of no talent at all can write great acting scenes. Sometimes the very best writers can't write scenes that come to life.
I was born in the theatre. My father was a small time impresario on the West Coast and I was acting from the age of 7, but I started to write when I was 12 and by the time I was 14 I was making more money than I was acting.