If I may, David Foster Wallace (as so often) said it better: > “But it’s better for us not to know the kinds of sacrifices the professional-grade athlete has made to get so very good at one particular thing…the actual facts of the sacrifices repel us when we see them: basketball geniuses who cannot read, sprinters who dope themselves, defensive tackles who shoot up with bovine hormones until they collapse or explode.…
I think the DFW was a little melodramatic here. I don't think the commitment to true excellence necessarily detracts from other possible commitments in the long run. E.g. DFW was a writer of singular ability, and he was, at various points in his life, dedicated to tennis, philosophy, and mathematics. More to the point, the time spent being great at CS doesn't seem to have limited this guy's future ability to do thing…
DFW is a good example, actually. As far as I know from reading his nonfiction, in tennis he never got beyond 'very promising youth' but dropped out at some point when he realized he would never be truly great; in philosophy, he published an interesting thesis which was well-regarded - but that's not a career in philosophy, much less world-class philosophizing, and then he dropped out of that; and I'm not sure what, if anything, original he ever did in mathematics. What he is remembered for is being a writer (with interest in tennis, philosophy, and math), and being a writer is what he spent most of his short life doing.
Fact is, we don't expect world-class people to have many real interests or sidelines besides dabbling; look at the recent post on Heddy Lamar. 'My god, an actress with a brain for non-acting things, who invented frequency-hopping?' You could hear brain going 'foom' in the distance.