I have never doubted the utility of our art as a means of improving physical conditioning and fighting ability. Greater confidence in oneself follows physical improvements, which I think is one of the top benefits of training in SD. And I think dedicating yourself to an art for its utility is wise, and in the hypothetical scenario where utility and perfect lineage are mutually exclusive, I think it would be a tremendous folly to choose a perfect lineage over the style that will whip your a$s into shape. With that being said, I can also understand where the people really concerned with lineage are coming from. For example, over the past decade I have very fortunately never had the occasion to use my martial training to defend myself or any one else. The last time I defended myself, I was 18 and a first-degree black belt. All I really had to do was pop the guy once in the nose and he was done, he was bleeding too badly to do anything with his hands after that. (No e-bragging) As for the rest of the guys I've trained with, I don't think any of them have had to fight with anyone either, and that's in 13+ years of training in SD. Maybe it's our area, or maybe it's a similar non-violent mindset we share. I'm pretty good at talking to people, so maybe I've avoided conflicts that way? But regardless, I'm convinced that the utility of a martial art depends on the time and place in which it's learned. If I haven't needed anything more than the basics, and we all agreed with Wookie that the Sparring Techs, Ippons, Chin Na, and Short Forms form a very useful base to our system, then what's the point in training past brown or 1st degree black? I don't need to fight for food, survival, or the opportunity to reproduce. I don't live in a rough neighborhood.
So I'm left with the physical and mental conditioning benefits. Why choose martial arts for that? I love weightlifting, I lift 5 days a week. I run on a treadmill afterward to stay lean. But to me, martial arts is FUN. It's social - you train with people who often become your friends. And I don't blame people for wanting to know more about the history of the art, because there are a lot of different personalities that find martial arts engaging. Some people are all about the usefulness of something - its utility is paramount. I think these people are less likely to feel concerned about an art's history, where the forms came from, etc. But I think a lot of people choose MA over bodybuilding or running or another sport because there is a richness of history, tradition, and foreign culture that weightlifting and running and ultimate frisbee don't have, at least to the same extent as martial arts. I think this second type of person may become almost TOO concerned with history and lineage, to the point that they might even leave the system if they become dissatisfied with what they learn about our history.
So I really feel like I see both points of view. And I really don't blame people for wanting more, just like I don't blame the guy who doesn't worry about history and lineage. I just feel like it's a logical disconnect to presume that lineage becomes unimportant because it won't save you in a fight - of course it won't save you in a fight, but again, and I can only speak for myself and those I've been close enough to, but guys who want to stomp me are pretty few and far between. I'm too nice to stomp
But I think it does follow that since we don't train to survive the rare fight, we train because it's enjoyable, and tradition and history are part of that enjoyment for a large percentage of practitioners, you can't really blame them for wanting to know.