Thankfully, this is not a terminal condition, especially since our livelihood is not dependent on being otherwise. What is interesting though is the fact that he made this observation decades ago, yet for most of us, tension and balance are still the biggest obstacles to owning a good repeatable golf swing.
Since the problem comes from a gene pool that did not provide these gifts naturally, we have to seek out solutions and work diligently at making the changes in ourselves so that these traits can be available when we need them. The answer as I found it came not from the world of golf, but from the body changing, internal martial art training I started at age 51. The secret is in combining Chinese Qigong (chi kung) practice with the basic golf stance or posture.
While defining Qigong in our language is difficult, it is a healing art that teaches the ways of creating, storing and moving Chi (energy) within your body. The internal martial arts use its principles extensively. Simplistically, it is energy work. It is a growing practice with many good books, articles, and teachers available if you would like to learn more, but for my purposes, I will just explain how I used the combination of Qigong and the golf stance to create a solid foundation for the improvement my golf swing needed. While the combination is an easy thing to do, it is a challenge to stay with and make effective. However, committing the time to a health practice to improve my fun was such a win-win that the effort became enjoyable, especially when I began to feel the results.
Standing Qigong is about creating a correct and balanced posture. Once you have established your posture, you use deep abdominal breathing and a quiet mind to focus on moving the air to both energize and warm your body. It can become quite an intense practice. What I do is use my golf stance as the posture, and my focus while breathing is on relaxing my body and allowing it to shift into a solid foundation. I try to get the feeling that roots are growing from my feet into the ground so that I am as solid as a tree trunk with freely flowing branches. I am sitting back with a straight spine and a good knee bend, balanced and feeling powerful. In my mind, I work on seeing a golf ball rolling into the cup.
Building that to a ten minute daily routine will earn you something that you can be proud to own. Since we are trying to swing a three foot long stick with a weight on the end so that it releases its inertia at a precise point on a perfectly created arc, having a solid foundation is essential to increasing our odds of success.