I don't think I ever really grasped the importance of the flat left wrist, though I had my right arm on plane (mostly). Kevin and Jerry showed it to me but we covered a heck of a lot of stuff! New thread to search; FLW,
I talked of many alignments in this analysis, innercity, but only once did I mention the Flat Left Wrist (Horizontal alignment), and then only as an inferior Address alignment. Your post reveals you are now focused on this Wrist Condition, and that focus colors everything you see and read. This tendency to hyper-focus on what we are currently working on is human, but it should be recognized and controlled. This is especially important for instructors whose responsibility it is to teach others.
Perhaps you noted Jim's visually Flat Left Wrist at the Top of his Backstroke in the introductory still-frame. On the other hand, are you sure you do not mean the Level Left Wrist (Perpendicular alignment), which was a major point of emphasis?
Either way, you're excited and learning, and that makes me happy.
Remember though, whether you were talking about a Flat Left Wrist or a Level Left Wrist or whatever . . . Over time, each thing we work on -- no matter its self-endowed importance at the moment -- recedes into the framework of our Total Motion and becomes subconscious. Only then will it be truly integrated and display its full value.
Meanwhile, listen for the many 'nuggets' contained in this lesson. Examine them one by one and ask, "Does this apply to me?" If so, then add each noted item to your golf "To Do" list and set to work as time permits.
Threaded Mode
