I have personally been to within 10 yards on Balck Bear and I think the closest ever for me Griz was some years back in 7A at out around thirty yds-ish (did not kill, have not tried Griz Hunting yet). They didn't attack and I didin't push the issue. We were good.
I am not going to get personal here on a puplic entertainment forum so it better suffice to say that I am not unexperienced in the realm of surviving life threatening circumstance. I am not a guy who reacts quite in the way you describe. Have you tried running a few K to get your heartrate up and then shooting, like a biathalon participant? Have you looked into such techniques? I also practice hitting such targets as a Bear head at least monthly (try some Cape Buff/dangerous game charge excersises on for size, plenty fun!).
Furthermore, anyone dumb enough to act in accordance with internet advice off an Entertainment based platform without taking responsibility for their own actions is out of it on a fundamental level. We are all responsible for our own actions and like you, I have not personally had to shoot a Bear in DLP. But none the less - killing is killing. Bears are not 10'+ tall and bulletproof or some type of immortal diety.
Now bg I am here for entertainment and do not dole out advice to others per se. Do what you want but I certainly did not have that kind of physical reaction around any Bear. Furthermore I have not ever had such a reaction to life threatening stimuli to where I didn't function as you mentioned. It's actually quite fun!
Your accusations are false Sir. None the less, thanks for asking. So been around Bear in a few spots (including where I live. How's Abby these days?). Closer to the flathead seems like more Griz to me.
Anyhow 3.5" at 100m has nothing to do with making the shot you describe anyway. No wonder you're overly concerned with missing!
Perhaps in the future we will be able to have a shoot sometime, would be very fun. Don't own any D/G Rifles at the moment... Looking into a couple, shall see. No rush, I don't treat guns like cufflinks and avoid wearing a suit if I can help it, too. Lol!
Congrats on 50+! Have you now Hunted for 50+ consecutive seasons?