my former FEMA working, by the book, therapist has a middle-aged son with SEVERE TBI. She exposed him to the best allopathic neuro modern tech possible, and they did dick for him. He came home after 4 months of treatment with very little improvement. huge swallowing issues really made his life hell. She took a course and started micro-dosing shrooms for him. Within 2 weeks he could swallow.
Not totally useless.