"You are the one with the knowledge of what needs to be done to deliver a project" I think you're missing the point. Nobody has that knowledge prior to the pro

"You are the one with the knowledge of what needs to be done to deliver a project" I think you're missing the point. Nobody has that knowledge prior to the project being complete. The only exceptions are very small projects or projects that are just rolling out pre-established boiler-plate solutions. Any reasonably complex and reasonably sized software system contains far more uncertainty than humans are capable of thinking through.