Would you strap a pair of skis on your feet for the first time and hurl yourself down the Hahnenkamm in Kitzbuhl?
as I said with the quote from Eno, with music you can crash and walk away - what part of that is difficult to understand? There is no physical danger from playing music and making a mistake, unless you played with Buddy Rich..,
Since I'm having to explain things, my point about sax teaching and Coltrane is that if a student wants to play Coltrane then it'd be far more encouraging and productive to get them playing one of Coltrane's simpler tunes than to say no it's too difficult and instead have them play Mary Had A Little Lamb or Hot Crossed Buns.
By playing music that you actually like and are interested in you stand a greater chance of being motivated and enthusiastic and will want to learn more about how that music works and can better relate the theory to the music that you love.
If someone's paying money for lessons then maybe the lessons should be geared towards what the student wants to learn and not what the sax teacher thinks he should teach. The best teachers are the one's who can channel their student's enthusiasm..
BTW, I never said 'ill informed' about the old days, but there weren't any formal jazz tuition courses until the late 60's/early 70's, so jazz musicians had to learn the hard way, by asking other more experienced musicians - Coltrane did it in the road with Earl Bostic, Art Pepper has said that he didn't start learning about sight reading and music theory until he rejoined Stan Kenton's band. Ornette Coleman learnt about jazz from Red Connors, Steve Lacy learnt about dixieland from Cecil Scott. Miles learnt about be bop from Charlie Parker
Jazz and blues was more of an oral tradition, handed down from one generation to another often aided by buying some elder player an bottle of their favourite drink.
This isn't to say that a formal education didn't play it's part - Earl Bostic had a degree in music, Cecil Taylor went to New England Conservatory and for some of the Chicago musicians the only way to get a musical education was to join the army. Those who could afford it had lessons and some schools had excellent teachers. The church also played a vital role in many black musicians education, but they wouldn't have been allowed to play jazz or blues on such hallowed ground.
In most respects they were better informed back then because they had first hand experience of playing and closer contact with their role models than most jazz students do now