I think you're giving "programmers" too much credit or "project managers" not enough.
I'm the product guy at a small-ish company and my main dev-side pet projects are deployment/CI and development workflow, and I've implemented 95% of the solutions for these as well as architecting our overall system.
Some would just say I'm a programmer then, but I think what padobson was getting at is that good people in any of these roles get their hands dirty in optimizing their area of concern, even if that overlaps in other areas.
I'm the product guy at a small-ish company and my main dev-side pet projects are deployment/CI and development workflow, and I've implemented 95% of the solutions for these as well as architecting our overall system.
Some would just say I'm a programmer then, but I think what padobson was getting at is that good people in any of these roles get their hands dirty in optimizing their area of concern, even if that overlaps in other areas.