Musicians always come off sounding a little bit pretentious, and a little bit... I don't know, hypocritical, from what they do, talking about strong issues. ↗
There is an apprenticeship system in jazz. You teach the young ones. So even if the musicians weren't personally that likable, they felt an obligation to help the younger musicians. ↗
A perfect record does not mean that someone is the greatest. Rocky Marciano never lost a fight, but I never hear anyone say he's the greatest heavyweight champion of all time. ↗