Mindfulness. That's what this all comes down to. Deliberately choosing how much time and energy you are going to invest in each path, depending on your specific goals and desires.

They way they have defined generalist in this discussion just says there is no such thing as a specialist because you cannot survive without learning a variety of things.

Basically this whole conversation is just saying that it is a spectrum, but both ends are impossible because of the nature of our existence. Thus we all exist as semi-specialized generalists. A realization that will shock noone.