Yeah, the dreamer, the realist and the spoiler aren't different people, they're different mindsets a person should have when thinking about ideas.
What the author is suggesting is that one person should come up with ideas, and then another person should implement their ideas, which is silly because people work best with they practice both the squishy conceptual problem solving and the more rigid how-is-this-actually-going-to-work problem solving. To say people should only do one or the other is non-sense.
Yeah, the dreamer, the realist and the spoiler aren't different people, they're different mindsets a person should have when thinking about ideas.
What the author is suggesting is that one person should come up with ideas, and then another person should implement their ideas, which is silly because people work best with they practice both the squishy conceptual problem solving and the more rigid how-is-this-actually-going-to-work problem solving. To say people should only do one or the other is non-sense.