That have not been my experience so far, every time I see a "10X engineer" (worked at several big tech companies) either they have been working in the problem for years or they put 12+ hours of works every day.I don't believe in geniuses myself, never seen one. There are for sure incredible people who have done great things, but you can clearly see, they lack in many other aspects of life. Also, note, that most of those people are not really interested in the "other aspects" of life, but as a complete human being, they have an unbalanced life, obviously, because you need time to develop skills.