He has developed perspective. In the same way that he sees the court, Dave sees rush-hour traffic, and believes basketball has made him a better driver. Most important, basketball has taught Dave how to get old. We're all on a kind of diminishing curve. As your life begins to go on the down side, the curve falls off, and you're not as productive.
Basketball is the same way.
Old friends tell Dave they quit because they got old, but as Dave sees it, they got old because they quit. Dave refuses to quit playing. One does what one must to go on. He has learned to play to his strengths. He claims to be a natural shooter, but probably whatever you do for 50 years, you do well.