Performance improvement gives strength to the individuals
When performance improvement is for individuals then it gives them strength. They come to know about the weaknesses that are present inside them. They can work things out to coupe with such weaknesses and they can become stronger.
It is always better for individuals to do performance improvement themselves. When the competitors know about the possible weaknesses present in the individuals then they try to take maximum advantage of such weaknesses present in such individuals which can ruin things badly.