These get trained to be able to reason about why the flowchart is the way it is or outright to construct it. If you can't create a flowchart yourself, you shouldn't direct work following it. Following the flowchart is, so that you don't make mistakes on execution, because there will eventually be mistakes, it's not intended that it saves you from knowing what you do in the first place. In other words: you follow a flowchart to prevent accidental deviations from the process. Once you question, what you actually should do, the flowchart is useless as guidance.