According to the content provided, expert teachers focus on what aspect of golfing?

Expert teachers in golf emphasize the swing mechanics because these are foundational to a golfer's performance. Understanding swing mechanics allows instructors to analyze and correct the various components of a golfer's motion, which can significantly impact consistency, power, and accuracy. By teaching the proper mechanics, instructors help players develop a more effective and repeatable swing, which ultimately leads to improved performance on the course. This focus on mechanics helps golfers build a strong technical base, vital for further developing other aspects of their game, such as course management or handling different playing conditions.