Depends on the dev; most higher level coding roles require proficiency in many domains and a certain level of polish. Frequently to cover the tail of the person hiring them.

I've been paid quite a bit for coding... but the premium was due to the projects requiring: a) statistical expertise, b) finance & pricing knowledge, c) transaction system design, d) discretion to deal with HR / restructuring information, e) quality assurance required for contentious BOD projects, and f) willingness to accept a fair amount of uncertainty, screwed up schedules, and outright abuse from senior level leaders without snapping back or ripping their heads off.

Good luck finding that at boot camp!