Thanks Steve!
To be completely honest, I don't think you can be proficient in self-defense or combatives without real world experience or fighting experience. I spent 9 years working at a the top night club in Hartford, CT. Without that experience, I don't think I would understand the true... Chaos of actual combat. Nor would I be able to understand the fear that is involved and learning how to control and use that fear. That understanding has better helped teach my students and get them trained. I also work with Police officers and SWAT team(s). And if you've ever worked with them you better know what you're doing and better be ready and able to "prove it".
The only other way to experience this is to actually compete in a competitive martial art such as Jiu-Jitsu, MMA, boxing kickboxing, etc. These experiences have also helped me further my understanding of a real fight.
Now - I am not suggesting that you must go get into a street fight to learn. But I do believe you need to train hard and fight hard to fully understand fear, chaos and the ability to fight and survive.
So, the final answer to the question would be... I believe someone can be proficient in reality-based self defense, but only if they have experience in real combat or their training / sparring closely resembles real combat.
For example in my Defence Lab DNA classes our sparring is rarely one on one. We do 2 vs 1, 3 vs 1 and sometimes 4 vs 1. We fight with someone seated, pinned against the wall, etc. Sometimes I'll quietly slip one of my students a training blade, a clubbed weapon or a replica handgun.
Just my opinion!
Great post, Matt! Are there people whom you would consider "expert" in a field? I think you make a great point about self perception and a drive for incremental and consistent improvement. It might be bad form to refer to oneself as an expert. But, isn't it just as poor form to knowingly fail to acknowledge the expertise of another?
I'm also very interested in your thoughts on the original question. Do you think it's possible to be an expert in something you've never done?