You're speaking as if passive-aggressiveness is some milder form of aggression, and that's not really the case. Passive-aggressiveness tends to express itself in situations that, IMO, do not "require some aggression". It expresses itself as a tool for one-upmanship, bullying and harassment.
Lord knows we've seen this on the mat all too often. As in the case of the know-it-all uke. "Your technique won't work on me," etc etc.