Also, in experience with self-organized volunteer organizations in different fields (not militias, etc.), the lack of discipline, organization, motivation, just basic thought is often shocking. The dysfunction can be overwhelming. I'm not surprised that very few have developed real capabilities.
> Navy SEAL/Delta-level
Maybe you didn't mean it literally, but that is a pretty high standard. It's like asking why you don't see local basketball players with NBA-level ability. 99.x% of military personnel, with years of training and experience, don't reach those levels.