He takes things personally, I don’t.
1)I have not looked for outside material on him. From his former student and American teacher of his system I’ve learned a bit. https://www.biogeometry.ca/biogeometry-hepatitis-c-research I’m sure independent sources could be found.
2.) I don’t know what to say about your family member. I took my first Reiki class less than 2 years ago. I don’t know if they are coping for not being proficient or what. You do not have to believe in it to work. I was taught, and karmically it’s better, to ask for the recipients permission. I’ve not seen that even suggested in any of the handful of healing systems I’ve learned about.
3.) At the time of my taking that class I had not ever experienced anything I knew to be “supernatural”. I now have a conceptual model that has many forces beyond the physical plane but nothing supernatural. So now I daily do energy healing and exploration of nonphysical phenomena. From checking which food is the most strengthening to doing Fung Shue by directly perceiving those elements and balancing them. Mostly still needing the pendulum like a magnifying glass as the perceptions are mostly quite feint.