You make great points, and I agree with everything except: systematically eliminate your weak spots.
Sometimes that is what you need to do. But sometimes you are better off further enhancing your strengths to real excellence rather than bringing up your weaknesses to an acceptable level.
Sometimes you can really sell your strengths, the things that make you stand out, and then work around the weaknesses by focusing on projects where they don't matter or by hiring an assistant/partner that can handle the areas you are weak in.
Sometimes that is what you need to do. But sometimes you are better off further enhancing your strengths to real excellence rather than bringing up your weaknesses to an acceptable level.
Sometimes you can really sell your strengths, the things that make you stand out, and then work around the weaknesses by focusing on projects where they don't matter or by hiring an assistant/partner that can handle the areas you are weak in.