While I agree with you on this, and plan my dives to have enough reserved air, I am not going to let a panicked diver drown me.
Which is kind of the point.
There are many ways to handle it:
0. Not help in certain situations
1. React to the situation in the tried and true, approach from the rear etc.
1a. React to the panicked OOA diver aggressively potentially increasing his/her chances of injury
2. Raise one own skill level to the point where an OOA diver in need can do whatever, and one can still handle it.
(I choose 2. But then, I do this for a living.)
I am not going to drown just because I am without a reg underwater. Others may not be as confident, and knowing their own limits lets them decide what they will do
I have had a panicked diver do
X to me (where X is just about anything one can imagine), and as a full-time dive professional, I feel like it's just part of what I am supposed to be able to handle. Of course, to get to where one can handle some
X like losing a reg at 100 feet, and then getting bear hugged, one has to have practiced handling that situation by practicing CESAs in that situation.
While I think most divers think (appropriately) first of their own safety, there are different ways to ensure safety, and that first is the decision of whether to help or not. There are also different approaches to helping. I know from experience that while controlling a diver from the rear is the best play in terms of controlling the diver's body, it is not likely to work with a borderline panicked diver who will just expend effort trying to turn around to figure out what is going on. And there is almost no way to effectively manage an OOA diver in that position.
But then again once a borderline panicked diver faces us, they are probably going to doing something not so good to us. I am cool with that. Most people should
rightly not be cool with that.
Remember the topic came up in first place because someone wanted to develop more confidence in their abilities in the water, especially when doing deep dives. Being able to consistently do CESAs from 100 feet/30 m of water will certainly make for a more confident deep diver. More confident, apparently, than many instructors who seem to doubt such a thing is possible.
(This topic, as may be obvious from some of the parenthetical comments made, has been 'discussed' in the "Instructors arguing with other Instructors" forum.)
There are some of us, however, who know that CESAs from 100 feet are not just theoretically, but actually, possible, because we have done them. At least three of us in this thread, if my count is right.