They were not hired to do anything other than check off stories on a task board, their “velocity” tracked by the system described in Piketty's “Capital in the Twenty-First Century”.
If one of them were to get too invested in the ideas described here, he'd be chastized by the other, or by a manager, or the rest of his team collectively, and potentially replaced.
This is at least part of what people mean when they lament that software engineering isn't treated as a profession in the manner of doctors or lawyers. Many of us may be very smart and able to weigh issues like these, but these things are not encouraged or rewarded or respected by most of the employers.