Anything can happen in a dive. Or are you saying that the long hose wrapped around your body poses no risk when a panicking OOA diver went grabbing for you?
Properly use something in a classroom environment is a lot different than in real life.
DIR divers are a lot better trained than a typical rec divers and since that they are all on the same sheet of music, they are a lot better off with their own configurations and maximize their trainings. If you dive DIR and your buddy isn't, then most of that teamwork training had just gone down the toilet.
It ain't too hard to put some thoughts into diving instead of drinking the kool-aid and think that one way of equipment confiiguration is good for all.
I will say that in any scenario you can come up with, for a panicked OOA open water diver to come flying up behind or approaching from any direction..the 7 foot hose, DIR style will be vastly superior to the alternative "traditional" stuffed octo in a holder, or Air2, or any other traditional set up for the octo.
The whole rational for the DIR system is to "be able" to handle a diver who is seriously/dangerously out of air, even in a total blackout or total siltout...
Unless you experience how incredibly easy it is to donate a 7 foot hose, the way we wear it, you can't know how this works. This is DEMO stuff, not internet arguement material.
Aside from how instantly and easily we can yank the reg out of our own mouth and instantly have it in the mouth of an OOA diver, the other ENORMOUS benefit is dealing with swimming after you have calmed down the OOA diver with sufficient air to make them comfortable again. When you begin swimming with a 7 foot hose, you both are completely unencumbered by the sharing--versus nonsense like an Air2, where divers are almost locked in an embrace, and neither can swim without bumping constantly into the other....not to mention bouyancy control now being screwed up with the use of the ridiculous air2 as a breathig regulator.
This is one of those ideas that sound great on paper, but when you actually buddy breathe someone with an air2 ( I have, with a rental I once had with Air2 on it), you should be annoyed at how poorly thought out the system is for getting the person back to the boat. Sure it can be done. In the old days, we did this with each having only a single reg, and you would take turns breathing out of one reg if your buddy ran OOA. But even though this could get a diver back up to the surface, it IS not the best or smartest way to get an OOA diver back to the boat, TODAY.
fnfalman, someone who is DIR in your area needs to step up and show you how this works..you appear to like to think things out for yourself, so reading all this banter is not going to do much for you--you need to actually try this long hose DIR method, and then tell us what you think
Regards,
DanV