What Makes A Good Planner?

When I first entered the strategy field, I often wondered "what makes a good account planner?" I would often hear many different opinions ranging from " Planners must be good with data tools." to "Planners gotta make sure they think like a human." When searching for the answer on what truly makes a good planner I stumbled upon on a video of Jon Steel, one of the top advertisers to who defined the field, defining what makes a good planner.