My guess that meditation is helpful is that it activates the cingulate cortex. In my rudimentary understanding of brain structures as they relate to treating PTSD, I have learned that a strong Cingulate cortex helps regulate through self correction. Meditation is helpful because we work the cingulate cortex: our mind drifts and we bring it back to some focal point. If you can do a meditation without brain drift, the positive effects of the meditation diminish.

Since cognition issues like focus, attention, word retrieval, etc are a correction function: this not that? It makes sense to me that meditation might feel relaxing but it’s actually quite active but without judgment?