My personal belief is that "Situational Awareness" and "gear familiarity" is most important. Spoons don't make people fat and guns don't "kill" people.
When I started cave diving suicide clips, ie... the first one devon diver shows, were BAD! When I started side mount diving in tight and sandy places they "bolt snap religion" nearly got me hurt. I needed to remove a bottle to get through a restriction and out of a cave. Sand under the bolt and spring would not allow that on one of my bottles. Fortunately, the other was fine. I removed the bottle, exited and all was well. The other bolt snap was full of debris and could not be opened. That could have been real bad had both bolts been compromised.
I chose to move to large suicide clips for that discipline of diving. I still use large bolt snaps for my bungies, back up lights, reels, etc. Each has is place in safety. In my case suicide clips are more safe for the lower attachment on my sidemount bottles. Situational awareness is important with all gear as mental preparedness is what keeps us safe not the gear we wear. The uniform does not make a player. Skill, practice, awareness, and willingness to think for yourself is most important.
There are reason to not use these clips, but there are also reasons they can me more safe. Don't just learn the "what's" Learn the "why's" as well. Mark