Neither superior intelligence nor imagination
There are smart people, there are smart people in society, but geniuses are very few. Their number is perhaps one in a million to one in ten million. The best answer to the question of why there is little or no is from Mozart. Being smart is not enough to be a genius, Mozart says, add your imagination, but neither of them create a genius. It takes internality to a different level, giving it a different dimension.
Geniuses are rare in the world. He is performing a task. He develops something, makes an innovation, lives short, leaves the world without experiencing or tasting the world. The arrival of people who can be said to be counted even to the world. Maybe a few names per century. He changes the period he came in, transforms things, even if it cannot be done on time, he drags him after him in the next process, and his works become permanent, leaving their mark and name.
Mozart says it is for the emergence of a genius neither to be clever nor to have enough imagination, or even the combination of both. He says this, but he is a lonely genius. Take a look at what Mozart could fit into that short life of thirty-odd years. Take a look at what works he produced, who listened to, who were affected and how.
In saying this, Mozart alone did not claim to be genius. Geniuses do not have such an issue anyway. They take care of their business, follow the path of science and science, fit a lot in a short life. Nothing for itself leaves much for Humanity.