Exactly. Passion may be indicated by that time you stepped up for a 60 hour week in a given situation, but I'm not seeing anything where the author expects such strict dedication at all times. I simply read it as a plea to reduce the job-hopping culture of tech (and perhaps of other industries that are following suit because of tech).

I don't know what it's like to work at Google but can guess there is a preponderance of disengaged paycheck-grabbers. You want to avoid hiring people that are just in it for the money and will jump ship when something better comes up.