Even then, though, parents didn’t shove their values down their children’s throats. When psychologists compared America’s most creative architects with a group of highly skilled but unoriginal peers, there was something unique about the parents of the creative architects: “Emphasis was placed on the development of one’s own ethical code.”

Yes, parents encouraged their children to pursue excellence and success — but they also encouraged them to find “joy in work.” Their children had freedom to sort out their own values and discover their own interests. And that set them up to flourish as creative adults.

When the psychologist Benjamin Bloom led a study of the early roots of world-class musicians, artists, athletes and scientists, he learned that their parents didn’t dream of raising superstar kids. They weren’t drill sergeants or slave drivers. They responded to the intrinsic motivation of their children. When their children showed interest and enthusiasm in a skill, the parents supported them.

Top concert pianists didn’t have elite teachers from the time they could walk; their first lessons came from instructors who happened to live nearby and made learning fun. Mozart showed interest in music before taking lessons, not the other way around. Mary Lou Williams learned to play the piano on her own; Itzhak Perlman began teaching himself the violin after being rejected from music school.

Even the best athletes didn’t start out any better than their peers. When Dr. Bloom’s team interviewed tennis players who were ranked in the top 10 in the world, they were not, to paraphrase Jerry Seinfeld, doing push-ups since they were a fetus. Few of them faced intense pressure to perfect the game as Andre Agassi did. A majority of the tennis stars remembered one thing about their first coaches: They made tennis enjoyable.

SINCE Malcolm Gladwell popularized the “10,000-hour rule” suggesting that success depends on the time we spend in deliberate practice, debate has raged about how the hours necessary to become an expert vary by field and person. In arguing about that, we’ve overlooked two questions that matter just as much.

First, can’t practice itself blind us to ways to improve our area of study? Research reveals that the more we practice, the more we become entrenched — trapped in familiar ways of thinking. Expert bridge players struggled more than novices to adapt when the rules were changed; expert accountants were worse than novices at applying a new tax law.