If this is true, then every 2nd grade teacher in our county is exactly equal to every other 2nd grade teacher in our county. After all, they all have the same textbooks and the same resources -- the same curriculum.
But in reality, we all know that every 2nd grade teacher isn't equal to every other 2nd grade teacher. Some of them are naturally more patient, more kind, more able to explain things on the kids' level. Some of them are more creative, some of them are better at managing classroom behavior. Some just xerox pages from the teacher's resource book, while others put together creative, hands-on projects. Some of them are naturals at organizing the classroom, some of them are strong on teaching reading, and some of them are better at putting together simple science experiements and history projects. Some of these abilities are innate, but much of what they're good at has been TAUGHT TO THEM through the educational process.
So I don't really think it's fair to say that anyone with a curriculum in hand can teach effectively.