I think Miles or Duke Ellington would get a kick out of this conversation and end up getting doll eyes.
This discussion has been going on since jazz was created. Nothing new or unusual here. In fact on my facebook feed just today, there was a similar discussion going on and some very heavy people weighed in on the topic. The discussion concerned the perceived unwillingness of new jazz students to put in the time to study past jazz masters. I guess they want to be weaned on YouTube, etc. Who knows?
It's a given that times are different than the days when Coltrane, Doc Cheatam, Scott LaFaro, et. al were learning their craft. Back then you HAD to learn it from someone else. And maybe that's what is creating the perceived difference in the quality of the music...
There's more info available now, and the music has been analyzed to death so everyone thinks it's all figured out. You'd think that with all these digital resourses, learning jazz would be pretty straight forward... I'm finding out there is a lot to it, and it takes an extraordinary effort to be better than "just ok" at it. Just having the right vibe and feel is most of the battle and you can't get that from a book - it can't give you a clear idea of how to express a sentiment...
Don't get me wrong. There's nothing inherently evil about books. But I don't think that should be a persons first avenue to trying to access this music. Jazz was a collaboration in the olden days, in a community way, not an institutionalized way, both in the learning aspects and performing aspects. Now it's more isolated, prolly because as a genre, it's not that popular and it's hard to find people to hook up with that have a passion for it.
I guess in the long run, it's best to just learn it however we can, so we can at least keep it going...