I actually believe the two concepts are tied, and I get that sense from the article as well. A lot of people look for "passion" because it's something the believe they can detect and think it translates into more code and more hours worked. I think the idea of a super-productive introvert who never shows emotion doesn't fit well with the idea of what a productive employee looks like to a non-programming employer.

Of course, employment situations like this can be "hacked" by doing little Dilbert-esque things like closing ticket tasks at night rather than during the day to make it look like you're working later since the system sends emails to the management. That turned out to be one of my most productive career moves, which meant it was time for me to find a new job.