I'm no revolutionary here and not politically inclined, but Naranjo theorized that many 4 women were probably part of the women's lib movement, and there is some indication that 4s would generally support movements for minority rights.
I'm not sure why you think it's bucking the system for being a system, it's bucking it for being unacceptably flawed. Being a rebel for its own sake is more cp 6ish, I thought.
However, I'd venture to say the average 4 is functional in the usual ways - working, cooking, cleaning, etc. But that's not what makes them feel "functional" because their sense of defectiveness doesn't lie in that. They may even be envious that others find satisfaction in such mundanity when they cannot. When you don't feel reward for certain so-called achievements, then motivation to pursue them further is definitely not high. The reward system in the existing framework is geared towards the utilitarian, unless you are very exceptional at your particular talent, and even then, the reward itself may not be desired. Practical skills are given higher social value in the average range, and the reward suits the mentality that tends to go with it. 4s are often seeking higher purpose, which is not what everyday tasks tend to bring to people.
That's why the profiles which describe healthy 4s as these brilliant and insightful creatives are a bit damaging, because they reinforce the 4 belief that they must be extraordinary to be happy and find meaning in life.