There are many reasons one should become enlightened to the polyvagal theory, least of which is to understand why those bothersome behaviors such as hypervigilance are there and how to deal with them.
Another reason to learn more is that it is horrible to be a mystery to oneself reacting to danger that is not there as though one is back in situations that happened decades in the past.
The polyvagal theory also explains why people who were victimized as children freeze when confronted with a sexual predator such as a rapist or other abuser today. It isn’t because they don’t want to scream or run, their brain has shut down and they cannot. Please listen to this episode and hopefully you will have a much better understand of CPTSD from it.