I've been told the undertaker will have to tie me in my coffin, so I understand your joke. I'm just too hard-headed to slow down, so I pay for it. I might hobble to class, then go full speed (hurting all the way) and then hobble home.
As for "wrist strength", I've been doing jujutsu for 45 years, so that's not a problem. My orthopedic surgeon always brings his nurses in and has me show them my wrist flexibility, which he says is abnormal for someone my age. I think it's just my "keeping them in shape" by doing my stretching exercises.
As for the "jerks" in training, I have one simple solution... twist the wrist. Mechanically, the wrist drives the elbows and shoulders when rotated in either direction, and if somebody is exceptionally strong, simply step out so they're "reaching", and you can twist their wrist with a few ounces of pressure. When stretching them out, use your whole body to move to your position, and they will have to reach to "stay connected". After that, it's watching where they land that's the problem...

By the way, don't be afraid to use your pressure point training to "motivate" some of the jerks to move their arms... they might whine about it, but they'll comply... if they're yanking on you, yank back... just wait until you're at the point of surrender for them. A few of those and you can say, "want to play nice, or do I need to hurt you?" After all, you're just learning something, not actually defending yourself... but you can change that equation at will...
Don't forget that you can always request a different partner.
