Agreed. I heard Seth Godin say something like "When I need knee surgery, I don't give a shit of the surgeon is feeling 'authentic' in his job that day, I want him to be a PRO and fix my damn knee. I don't care how he feels!"

So I agree. However, I also think if you have the opportunity to move to a career you love you should do it. Not everyone has that opportunity, sounds like this guy might.