[Jimmy]

>What holds them back is that they don’t learn to be original.

More than likely, they simply lacked the capacity to be original (as in, world-class historical originality, which is the subject under discussion here), just in the same way that almost all people lack this capacity. It's only particularly surprising that child prodigies rarely become adult geniuses if you confuse genius with the capacity to learn information and acquire skills. Mastering calculus at age 6, though highly unusual, does not in itself constitute original work, and, going off of the data, is not an extremely strong indicator of the presence of the capacity to do original work.

So you can't necessarily expect creativity-focused interventions on child prodigies to produce more revolutionary geniuses than normal.

[hacknat]

Excellent point. If anything the anecdotal data points to the opposite being true. Hendrix didn't learn guitar until 17. Einstein showed signs of having a genius for math and science in his education, but not anything above warranting anything, but being accepted to a middling teachers college. Edison didn't graduate high school and invented the phonograph in his spare time in his late 20s as a telegraph operator.