They have different jobs. An officer receives and leads the mission and will bear the responsibility for how it’s performed. A low level officer such as a 2lt usually deals with this on a small scale, such as a single squad. While this puts him close to the NCO’s scope, the NCOs are focused on the inner workings of a squad or platoon. They can give valuable info on individual strengths for specific tasks in the squad and tactical familiarity. A good 2lt will use that and combine it with his higher level approach including logistical concerns ( timing, transport, supplies…), intel about the situation as well as comms with possible other active elements in the area to formulate a strong plan to maximize success chance and minimize risk.

A NCO has completely different training and knowledge from an officer. The whole planning and strategy part, including high level communication and logistics are usually of no immediate concern to an NCO. Still, depending on training and experience, they might have insights on particular fields, and a good officer uses any advantage.

If seen like an ordinary job Enlisted are “workers” and Officers are “leaders” and NCOs lead sections of enlisted under their control. Kind of like middle management.

NCOs don’t do big picture mission planning, lead a group of tanks, etc but they do execute the mission and they usually know what a good plan looks like. They can help a new officer understand how things will go and avoid rookie mistakes. Once the officer gets experience NCOs will still be there to advise them of course.

It’s like teaching someone how to drive. When they are new you ride along to help them learn, but ultimately they the one actually behind the wheel and you are a passenger.