The world’s greatest gold mines reside in the tail of a bell curve. Not the horde in the middle, but the cadre in the tail. That’s where fewest competitions and highest rewards exist.
But you can’t get there if you go too wide. The limited time and energy you have in your lifetime compels that you carefully choose what to spend them on. There is only so much that you can do and learn. You can’t say yes to everything.
Michael Jordan can’t reach the curve’s tail if he diversifies, so can’t Johann Sebastian Bach and Emily Dickinson.
Concentrate your effort to hone skills of your choice, particularly the ones you love and are synergistic, and watch yourself heading toward the bell curve’s tail.