Because you're close-minded?

And, how, exactly, did this mediocre biologist get a job as a research associate at the Smithsonian and become Managing Editor of the Proceedings of the Biological Society of Washington?
Um, you are aware that those are second-string jobs, aren't you? Possibly even third-string, depending upon your specific desires. I had a better job than those three years post-Ph.D., and I'm hardly a superstar.
A
first-string job in the sciences is a professorship at a top-flight university or possibly a high-ranking (much higher than "research associate" or GS-13) administrative position at one of the various national laboratories. A second-string job in the sciences is a tenure-track position at almost any college or university. Postdocs are usually reserved for brand-new, ink-not-yet-dry Ph.D.'s. Being a soft-money postdoc for longer than five years or so is usually a sign of a scholar who isn't very good. Being a soft-money postdoc for fifteen (as Dr Sternberg is)... well, let me just point out that it's extremely far from being a good sign.
Similarly, "Managing Editor" of a third-rate journal is hardly an impressive accomplishment. (If you want to see just how bad it is, its impact factor is about 0.23, meaning only about a quarter of the papers presented in it ever get cited again. Alternatively, you could note that it costs only about $40/year for the back issues; back issues of major journals are incredibly expensive precisely because the demand is so high and they're cash cows for the publishers.) He's not even the "Editor," but just a glorified gopher -- you do know the difference between "Managing Editor" and "Editor," right?
Another sign of weakness is his lack of funding; according to the c.v. you cited, he's received two "postdoctoral fellowships," but no actual competitive project-based grants. THis alone would make him more or less noncompetitive if he tried to apply for a job at my university; after fifteen years of research in the biological sciences, he should have been able to find project funding.
So my bet is that this mediocre biologist got his slot at the Smithsonian because no "real" university would hire him, and similarly, he's was working at the third-rate journal because a) the GS-13 postdoc didn't pay very well and b) he's not good enough to work at a higher-profile journal (and he was in the Washington area). I'd be much more impressed by his credentials if he were an honest assistant professor at the University of Southeastern Mississippi.
And, yes, Dr Garey's c.v. (which I cited above) is a more typical academic career arc for a competent (if not necessarily stellar) researcher.