I thought about writing a line-by-line response to your reply, but the wacky quoting made me give up. Here's the high level version...
Simulations are simulations. Emergencies are emergencies. In my understanding of the universe, if you fairly completely replicate an emergency, you have an emergency. In at least some of the cases you listed - by my estimation - you are not doing simulated drills. You are triggering emergencies. You are,
perhaps, incrementally more in control of the situation for having triggered it at a known time. In some cases, you've specifically said that you are expecting somebody to trigger it at an unknown time. These are emergencies - not simulations. That is why training regimens that involve those types of exercises are so closely
(both physically and mentally) observed - rescue is sometimes a necessary outcome.
Let me give you an example, using your runaway drysuit inflator "drill". If you limit yourself to practicing disconnecting and reconnecting the hose under normal inflation, that's a solid drill. You're practicing a motion, such that you can do it smoothly and calmly. Muscle memory DOES work under pressure, even if you didn't acquire it under pressure, so long as you're aware enough to remember that there's a solution
(which is an entirely different skill unto itself).
If you actually intentionally significantly overinflate your drysuit to the point where there is real time pressure to react, then there are two options...
- You manage to control the situation in time, and we're both safe
- You fail to control the situation in time, and you rocket to the surface
I guarantee you that if option #2 occurs, I am NOT following you. I am NOT trying to stop your ascent. Frankly, even if I wanted to stop you, it would be extraordinarily difficult, and the most likely outcome is that I put myself in danger too. The extent of my involvement would be to make an expedited (but safe) ascent, and attempt to rescue you on the surface. There is no "clean up and try again". There is no drill. We had a genuine emergency, and hopefully you avoided the worst outcome.
Take a rescue diver course. Take a UTD Essentials or GUE Fundamentals style course. All of these courses will help give you a foundation for thinking about diving safety in a proactive, conscious way. I appreciate the fact that that's precisely what you're trying to do, but I think you need to see how some very experienced divers who take safety and preparedness VERY seriously approach the problem.
If you don't want to be proactive about safety for yourself, be proactive about it for the random person in the ocean you might need to be prepared to help. If you're a victim, you can't be a rescuer.
Just my 2c...