Yeah, but without actors to play the part, the words are useless as well.
That's like saying the head coach on a football team is the most important and that the players don't really matter all that much, since, they're just following orders and doing what they're told. You have to be able to carry out those orders with success.
A good management team is only half of the puzzle, you also need good players to execute your vision.
I've seen a lot of movies go to complete shit because of poor casting choices and poor acting. I've also seen movies go to complete shit because of poor directing and producing. IMO, you need both sides to be good, not just one.
Yes, you need both. I just believe that acting is more about interpretation. Whereas writing and produceing is more about creating. And I admire creating far more then interpreting.