What are your opinions on this concept for a hypothetical Earth?

A world where all humans, despite being genetically identical, grow into completely unique-looking people. This could include features like skin color, eye color, hair color, height, and other features like height, arm span, weight, and body shape. I believe this concept could be interesting in the realm of fantasy, but I'd also like to hear your thoughts on it in the realm of science fiction or even modern day reality. It would be quite fascinating to see how the world would function in such a way.