Knowledge is important. It’s good to know as much as possible about your buisness, job, or sport.
What’s also important is knowing when to access this knowledge or not. Knowing a lot could slow you down.
Knowledge gives you more to think about, more reasons to hesitate. You know every possible way to get the job done and can’t decide. You also know every possible thing that could go wrong.
The person who knows nothing can, with the right mindset, move quickly. There isn’t any knowledge to sift through, no memrory of mistakes to worry about. As long as he’s not waiting to know more before taking action (very possible, since info is so easy to get that everyone feels he should get more of it), the ignorant can be first movers and thus, win.