The same may be true of weight-lifting. I suppose we don't like to look lopsided.
But sculpting our bodies may not be like sculpting our minds or our skills. Both teachers and students, adults and children, benefit from recognizing our strengths. And we all have things we do well.
Steve Wyborney words it like this:
While I had long believed in the value of improving in my areas of weakness...I came to appreciate the importance of focusing on and improving in my areas of strength. Doing so unleashes the incredible potential to develop true expertise that can be shared with others. As you grow you strengths and reflect upon them, and especially as you share them with others, take note of what happens to the "weaknesses" that you chose not to place your focus on. Notice what happens to your confidence. Then, notice what happens to your "best." I suspect you'll discover that you will redefine your "best" every time you authentically stretch for it.
You cannot know what your best is if you do not try to approach it!