I ask, should live music really be the holy grail of audio experience? Based on my live concert experiences, I would more often choose to hear my audio system over live music. I point to poor sound reinforcement, less than favorable venue acoustics, even poor performance as reasons to favor the in home experience. While I can accept live music as the ultimate musical experience, it more often doesn't live up to it's promise.
Absolutely have the same kinds of experience with much of the live music I hear (not all of it or I'd probably just stop going). As I intimated before, holding the experience of live music as the "holy grail", as you put it, is an exercise in frustration, and can easily get in the way of enjoying a perfectly wonderful system. I recently read an excellent summation this fruitless effort, albeit in rather coarse terms. Nevertheless, it summed up my feelings on the matter quite well. I'll see if I can find it in my 'history' and post a link.
I completely agree that room treatments can make or break both a system or a concert venue. It does not necessarily have to spoil ones experience of the music though...I guess that's really up to the individual. I can think of concerts where the acoustics were not great and I had a great time and very much enjoyed the experience, and I can also think of times where poor acoustics absolutely ruined what might have been a really great concert.
I don't think that depth and dimension is the be-all end-all goal of all audiophiles. As Dave_b illustrating with the 'meaningless drivel', which could, of course, be applied to most of anyone's material pursuits. I guess my response to that would be to ask why you were participating in the conversation if you felt that way? Other than that I agree with the rest of the sentiment - go with what moves your heart and soul. I don't know that any of us can actually completely remove our 'head' from the equation, but it is a noble pursuit (the world may be a better place if we could). Ultimately it is the best of what music does for me (as well as other pursuits of passion): it takes me out of my head. What a great feeling that is!!