It's basically the difference between top-down and bottom-up. For good planning, you need to have a good knowledge about your domain, and lay out all the routes and solutions, and then just execute them. But new greatness usually comes from the unexpored, dark corners of your knowledge-map, so it's by definition kinda impossible to plan for greatness and success. Though, you can plan for raising the chances of finding success, but this is a different domain of planning, so it's not something anyone can do just because they can plan other types of projects. And let's not forget that humans are very depending on mindset and energy, to manage their limited mental abilities. Executing one type of plan will naturally prevent you from doing other things.