Re: The relevance of origin.
If by "origin" you mean "lineage", its important to me.
If by "relevance" your mean "important", (being personally contextualized) its important to me.
I like knowing the what I am studying has some history and has survived over time, so its more the mental, emotional, and possible social application. Getting my head around why I am doing something actually helps get my mind out of the way (gives permission) to doing it.
In direct physical application of training and technique, not do much.