The emotional challenge in this study was that you had a joystick and sometimes you pulled that joystick towards you when you saw an unhappy face. That's what was paralysing emotional challenge was for highly anxious people. Meaning it's unlikely their PFl could have any control in real life scenarios. It's important to note that in both anxious and non-anxious people the PFl was highly excitable. It's the pattern of its activity that makes a difference.
Cognition is hard work and the truth is you can't reason about your entire life and expect much success. Like driving a car as a learner your whole life, I remember the first driving lesson I had, I couldn't even focus with the radio on. Imagine if every time you got in you had less intuition about how to drive.
Think of the absence of fpi as a lack of intuition you get once you learn to drive.
CBT +/- an SSRI for 6months is a small price to pay to regain intuition.