Champ, it is fine to point at different margins of safety of different techniques. But it is not OK to claim it is always wrong to use the technique with a lower margin of safety. The best you can do, and should do, is to point out the differences and let people decide for themselves which one(s) to learn and practice.
Do you always climb ice with a double rope system? If not, what happens when the second damages the rope with his/her pick? Many years ago, Gri Gri were thought of (and maybe even marketed) as being much safer than ATC for lead belaying. Well, what has happened? False sense of the level of safety has led to complacency and there are so many stories of leaders being dropped while being belayed by a Gri Gri. Nothing is better than the most sosphiticated tool in our arsenal; our big brain.
Edit: Many things are now made with a lower margin of safety compared to a generation ago; aircrafts, buildings, etc. However, that does not mean they are less safe than 30+ years ago in real life and under realistic conditions. It just means we understand better and do things smarter.
Nothing I can think of in climbing is fool proof. No amount of ranting by any of us is going to change that fact.