I am praying for your friend as well.
I am the Safety Manager of an industrial construction company and we preach and practice 100% tie-off. When Fall rolls around, we cover some offsite safety topics in our safety meetings: gun safety, eye/ear protection, tie-off in tree/ladder stands, etc.
I was watching a hunting program recently and saw that a few hunting show hosts had come together to film a commercial on tying off in a stand. They made the simple statement that most hunters know someone who has fallen from a stand. I find that statement to be true.
Making no assumptions, but if it were me laying in that bed suffering that trauma with a long road of therapy and rehabilitation ahead, I would want you to keep a video journal of the recovery. Present it to major hunting media (magazines included) for professional editing and distribution to show the consequences of such an incident.
Drunk driving campaigns use this head-on, shock value to drive the point home. My opinion is this sort of PSA (Public Service Announcement) would be very beneficial to all deer hunters, young and old.
Maybe this is one of the "good things" that can come from this tragic incident.
Our hobbies can have real consequences that change our lives forever. Be safe out there.