Any large team ends up as an average of it's members. So all you have to do is be above that average. There is no large company in the world that meets with a web designer and says "Do what you think is right, you're the expert."

Its similar with internal IT. Invariably they have to answer to people that have no tech background/knowledge, and those same people will not allow the IT dept to make decisions independently. Large organizations guarantee suboptimal results in this manner.

You see the hubris is even more prevalent in the big corporations.