There was a blog post the other day arguing that great developers aren't 10x but infinity-x. It sounds ridiculous, but their point was that great developers don't simply program faster but solve problems other developers are entirely unable to solve. And that makes sense to me. It's the difference between an AI boot camp graduate and someone with an ML PhD. They might apply a sklearn function at the same speed, but as soon as complex problems appear, the former hits an unsurpassable wall.
edit: https://www.seangoedecke.com/weak-engineers/