My youngest son freezes in fight or flight situations. I’m trying to break it. Although a natural reaction, you can be trained to change your natural disposition.
In my experience there are 3 types:
1) the majority: freeze
2) the 2nd largest group: run
3) the smallest group: fight.
This group has been trained. It’s not a natural reaction. It must be drilled into you until muscle memory takes over. This is one of the reasons for boot camp. The Marines are the best at this type of drilling.
I was not a Marine. But, the Air Force provides this training in advanced training after basic training. Mine came in survive, evade, escape, and resist (SEER) training. My years at FAFB will never be forgotten.