"if an engineer moans and moans about his tools, and refuses to work in anything but his favorite language, I would say he's an absolutely terrible engineer."

"if an engineer moans and moans about his tools, and refuses to work in anything but his favorite language, I would say he's an absolutely terrible engineer." Let's say he's great enough to get lots of job offers. And let's say that among those, the ones in his favorite language - the one he actually enjoys using - also tend to pay more, and his average coworker in them is more proficient. Is he terrible to start filtering his job searches by that language?