[ Specialist / Generalist ]

Generalists are typically good at a wide variety of things, while specialists (technical specialists) are good at their chosen expertise. 

Generalists excel at many things:  managing projects, people, scope, risk, quality. Any number of wide-ranging, multi-disciplinary topics.  

Specialists dive deep into a topic. They know the topic inside and out, and have ‘done’ it more than a few times, and are known for it. 

(And, sure, a very good project manager might be considered a specialist project manager, that’s true).

On projects, and in society, we need both specialists and generalists.   You wouldn’t go to your GP for knee surgery.